I have been using the pixymon camera for some fun off season project. Here is are auto aiming ping pong robot
https://www.youtube.com/watch?v=2pQD2WqQjCM
It is very impressive however there are some big downsides to it.
1) if you ever brown the camera out it will loose its configuration
2) Camera does not have great resolution so distance is a problem
3) Can not do any advanced shape detection. This is almost a must in FRC
over all i would not recommend it for FRC. It is a lot of fun to play with and to learn but just not great for FRC