After two days of playing with the SIXAXIS, have we reversed our previous thoughts of how good it is? Yes, I think we have.
Previously, we thought the trigger buttons were too slippery and the controller too light. Now that we've gotten a lot more play-time with it, the SIXAXIS feels just like a DUALSHOCK. The R2 and L2 shoulder buttons are pretty squishy (that's good), and as long as you press it down in the middle of the pad, there's fairly little chance of slippage. The weight issue is negligible, and the lack of rumble was hardly missed. Since rumble was never a uniform thing throughout games, not having it doesn't really affect gameplay at all.
In the two games we tried, Genji and Resistance, the controls were tight and we didn't have any problems.