After one day of play, I think the G13 feels more comfortable then the standard WASD. Even if you just the standard WASD the G13 just feels better.
Also - the joy stick and some of the other buttons and assigned keys make it way more useful.
I really enjoy using it.
I hope that they have a stat feature for the LCD screen for Black Ops - like they do for other FPS games. Be cool to know info on kills, deaths, ratios, shots fired, etc.
Of course I am a stat junky.
I give it a big thumbs up.