It became time for me to purchase a newer gaming keyboard and, unfortunately, the original Logitech G15 keyboard is impossible to get a hold of without paying way too much or getting it used and even then most people want way too much for it. I went with the Logitech G15 revision 2 keyboard.
Initially, I had some issues with the keyboard. The use of red LEDs annoyed me because everything else on my system is blue LED in colour so it stood out and bothered me that it was different. Given some time I have come to very much like the use of the red LED, however. More importantly, I had been using a Microsoft ergonomic keyboard for as long as I can remember. Going from the split and slightly turned keyboard layout to typing using a "normal" keyboard again was extremely difficult. Not only were the keys closer together but I am forced to position my hands and wrists differently. I had some issues as a result but within a week I had completely re-acclimated to using a normal keyboard again and can touch-type with this keyboard as if I've been using it forever.
The Logitech G15 works beautifully under XP Pro 32-bit SP2/SP3 and Vista Ultimate 64-bit SP0/SP1/SP2 in my experience. The colour is attractive and good in a dark or dimly light room with the LED brightness levels. Another level would be useful, however, since there are only 3 settings: off, dim, brightest. I would like to see an additional setting that is brighter but I wouldn't not purchase the keyboard simply over that. The software and drivers work wonderfully although the Logitech Media Display which shows media info on the LCD can cause problems with other software obtaining exclusive access to CD/DVD drives. I disabled it.
When I first contemplated a gaming keyboard I looked around. I looked at the Razer keyboards since I also use a Deathadder mouse but, in the end, I went with the Logitech G15 because it has long since been considered the best of the best by many people. I also took a friend's opinion into account who has owned both the G15 rev 1 and G15 rev 2 keyboards.
The G15 isn't the cheapest keyboard but it has been around for awhile and has a proven record of being a good board. I definitely recommend this board to someone looking for a new keyboard or replacement especially for gaming. The only real issue I have when all is said and done is that I feel the wrist rest which, of course, attaches to the front is not of a solid enough quality. The rest is thin plastic and I don't feel the connection to the keyboard body is secure enough. It stays connected but I could see the plastic connectors that are part of the rest, itself, breaking. The body of the keyboard, itself, is solid. The wrist rest just seems like it was handled as an afterthought.
NewEgg USA has the G15 rev 2 for $89.99 which is robbery. Amazon USA is selling the G15 for $79.99 but some Amazon marketplace sellers have it for even less.
I wouldn't hesitate to buy another G15 were I to build a new system or need to replace my current G15.