Yeah, I have Hoops. It's quite good, and has fairly unique touch control. It doesn't feel like any other DS game I've played. The action is fast, there are lots of unlockables, and it gets pretty hard. The collecting coins multiplayer is pretty weak but the battle mode multiplayer is pretty fun for awhile. I imagine playing the normal basketball game multiplayer would be the best way to play the game, but the only person I knew who owned it sold it before I could play with them. :<
I haven't played as much as I should, because I got distracted by other games shortly after I got it. I'll return to it more hardcore sometime.