Caffeine! That's the secret to doing well in this game. The gameplay is so quick that any stimulant is a plus :-)
Positive - Guess what! You can shake your avatar's head and move it around like you're bopping to a beat. This caused me to crack up when it became addictive with other gamers. In between matches there's a pause and you can see your full avatar with the previous round's stats. During this time all four avatars were bopping, shaking, and whipping their heads around that we forgot that a match was going on. When everyone was done making fools out of their avatars the A button was pressed and the game continued. Good times, good times. The graphics looks great. Getting in and out of a game was seamless and no lag in gameplay. Oh, and you can even bring a guest from your console to online matches.
Negative - If you don't like make quick decisions and constantly on edge during a UNO match this is not the game for you. You should try the regular UNO game. This is an entirely different animal. I would suggest downloading the trial version of RUSH and try it on for size before committing.
Overall - The game is well with the MS points. I gave it a an 8.0 (B). It set out to do exactly what its suppose to do. It wasn't earth shattering, that why my score wasn't higher. But a good solid game with excellent graphics and sound.