I'm happy with the keyboard thusfar. I'm generally a fan of a good predictive text client over a crammed qwerty keyboard on a mobile device (which I'm used to being made fun of for), but I like the g1 keyboard better than any of the blackberrys I've used and the Dash. I think it's due to the spacing, and I also have a personal preference for flatter keys. I'm not a fan of hard, nubby keys.
People have pointed out to me that on actual keyboards (when using computers) the way I type is weird. My fingers lay pretty much flat and move up and down the keyboard with the pads of my fingers touching the keys and my knuckles almost paralell to the keyboard. I dunno if that translates into the way I use keyboards on mobile devices and skews my key preferences.