I've had some good ones, but a lot more bad. I only use them if there is no other shot and I mean, I dont have a choice AT ALL.
Couple weeks ago my fiance was laughing her ass off at me cause I nailed one right where I wanted and it started rolling toward the basket. Right after I said "YES!!!" it hopped and turned a big circle all the way into a parking lot and I kid you not, I sat there wathing it for at least 2 minutes roll all the way around back my direction and hit a parking stop, hopping over it and to a final stop about 15' behind me to the right.
I hate rollers.