I noticed that as well (and why it happens is explained on that wiki page), but the Das Keyboard has 12-key rollover. That was one of the major selling points for me: even if a couple of keys happen to be in the same key switch matrix, you'll still get at least 9-10 keys. I've yet to find a combination of keys requiring less buttons than I have fingers that causes a keypress to not register. I just tested your example (rightarrow + leftarrow + leftshift + rightshift + 1) and all keypresses registered.

I would recommend to anyone thinking about purchasing one to get the Professional (WITH key inscriptions). When gaming, you switch a lot between mouse/keyboard and both hands on the keyboard and even if you are a great typist, you'll sometimes find yourself wanting the inscriptions, especially when typing symbols like ^&*()_

I use mouseover macros for healing and have binded these macros to my gkeys for a set-up that works very efficiently for me. As other's have mentioned I use the middle set of 6 keys as my w,a,s,d,q,e buttons. I have my primary heal buttons on the top set and things like Shield/Dispel/Abolish Disease on the bottom set.

I never really liked the weird combinations of shift+click or alt+click for healing via Clique addon so this helped me find an alternative route that wasn't at the cost of reaction time.

I had the G15 for almost a year before it broke on me. I like to kick my feet up and put my keyboard on my lap while I play. With all the moving around over time, I had damaged the cord that connected to the keyboard. I would have problems like losing keyboard functionality for a second(always at the worst times). Since I play a druid and thus regardless of my spec I have less than 5 buttons to push, I never used the G keys to cast spells.

Instead I used the G keys to say messages in raid, ie. "Findruid out of mana, (name of other healer) pick up heals on tank." I never really used the LCD for anything. I use vent and music on my laptop (which sits next my gaming computer) in order to optimize performance, so I didn't really have a use for the screen.

As far as usefulness on my alts, I like to make super macros and bind them to 1-4 and/or my MX518 mouse from Logitec (it has 6 extra usable buttons), the idea of course is to never move my wrists.

So, overall I don't think the G15 Keyboard was a good buy for me. I didn't even get a year out of it.

I made a g15 macro to do the Hodir spear daily. Lazy and simple, but I got tired of mashing 2,4,3 or watching the cooldown for 4 for a silly daily. Now i just mash the g15 macro and use the 1 key when I need to.

From reading the thread, I'm glad I got a G15 Rev 1. I use g15 macros for lots of things including dropping my standard totems.

For those interested in this stuff but unable to get a G15 r1, they've announced/released the G18 which has 12 G-Keys, a full color LCD and orange backlight.

Not sure if it's available for sale yet, or when it will be if it isn't but it is definitely something to keep an eye out for, picture here on engadget along with G13 too, Logitech G18 gaming keyboard shows its not-so-ugly face - Engadget

I had a G15v1 about a year ago (still collecting dust somewhere), it had its perks, but in the end the few functions that I used didn't warrant the size it used on my relatively small desk.
It was great for arenas when I was playing my priest, made a macro that buffed everyone in my group with single-target buffs at the arena preparation with one keystroke (one macro for 2v2, one for 3v3 etc naturally), I also placed some situational stuff on the G keys, such as the tear on Archimonde, the ghost's abilities on Teron and similar. The display was nice, but I never really got any proper use of it, my biggest peeve was that it seemed to be unable to change stuff on it's own. Like when I was tabbed out I had to run the WoW mods to be able to see that I got a whisper, and I usually ran my foobar mod to control my media player on the screen. The BG module was nice, but I never got any use out of seeing my own stats really.

This was when the keyboard was fairly new of course, have the things I mentioned been improved or changed since? It might warrant a retry of it.
Using a Fractal Design keyboard now, love it.

Not using mine.
Unluckily I'm running a Linux system and I haven't got that screen to work at all. Haven't even tried during the last half a year. Also not using the G keys.

Heh, I had to load up wow just to remember what all my buttons are used for. I hit them pretty reflexively. This is my enhance setup, all I do for resto is simply have a G macro that has Shift Down, and that's it. Then I just left/right click on grid

G1(cast WF+FT) G2() G3(drink)
G4(cancel wep buffs) G5() G6(pvp trinket)

G7 (res) G8() G9(warstomp)
G10(dogs+taunt)G11(dogs+sprint)G12(just dogs) dogs are feral spirits, and I macro f8 (my hotkey for them) and f2, or f3 (taunt and sprint respectively)

G13() G14(enter /tar ctrl+v enter) G15(spam 1) for g14 I made a macro that will let me copy someone's name, and spam /tar pretty much. I recently did the occulus achievements which require you do nothing other than spam 1 (emerald dot) and strafe, it's also useful on malygos I guess
G16() G17() G18(spam r-click) for opening those damned chests! (it's amazing)

Gx() means unassigned

I'm curious as to whether anyone's used the scripting interface for the G15 in WoW yet, to create some custom macros.

I also play with my toes, well, a toe. I have my dps rotation macro'd into my Belkin Nostromo that sits on the floor. Go ahead, laugh. My guildies do. I take it in pride now though, I just remind them they're getting out dps'd by a single digit.

I use a tray, so I never actually use the LCD display, I'd die without the media buttons though. I can't raid without my Nightwish/Blind Guardian running in the background

I would like to set up multiple WoW profiles on my G11 keyboard so that I can accommodate custom layouts for multiple toons. I have tried and failed; I'm stuck on the single profile. Is it possible to have more than one WoW profile?

The G15 is an incredible piece of equipment and if it were within my power, I would make it mandatory for raiders.

Yes, the ability to see who is talking in vent (or who is bombing the server or has an open mike) is huge.

The 18 extra binds from the classic version are VERY worthwhile. I as a protection paladin bind them as follows:

G1: Righteous Fury
G2: BoSa
G3: BoM
G4: (bound to whatever situational channel spam macro I am using at the time)
G5: BoW
G6: BoK (yes, I'm forced to take it)

G7: Salv
G8: BoP
G9: BoF
G10: Divine Plea
G11: (situational)
G12: Divine Protection (Shield Wall)

G13 through G18 are bound to macros to mark mobs with symbols, and place a message in raid chat indicating the symbol has been applied ("%t designated [Mark] by Aestu").

The extra binds' utility is obvious and extremely beneficial.

The keyboard itself is sturdy but the coloring of the keys wears off quickly under the pressure of extended use.

Finally, the greatest benefit conferred by the G15: To suppress the Windows key to avoid an untimely minimize.

Pre-3.0 there was a really great mod, Its' G15 Binder, which could make the G* keys simulate real keys. No need for weird modifier/key combinations (technically, the add-on did that for you.) Because of this, you were free to use modifiers as normal on your G* keys, ie Alt+G1, Shift+G1, and Ctrl+G1 could each be bound separately, like normal keys. Unfortunately, due to undocumented changes in 3.0, Its' G15 Binder is broken. The author claims to be working on and update, but no luck as of yet.

The Its' G15 Binder add-on makes the G15 greatly more usable. You should all hope over to the link above, and leave an encouraging comment for the author so he'll work harder to update it.