Pros: they are durable, sleek, fast, with a low profile, with great battery life.
Cons: They are a little on the heavy side. They can jam with bad paint
I've had my Rotor for this whole season and its worked great. Only problem is I have the first generation of them so mine tends to jam more than others.
They work great! i haven't had any problems with them.
NOTE: if you have jams turn down your tension, there is no reason to feed +40bps into your gun thats only shooting 10-15bps. it save batteries, is more bittle on paint, and drastically lowers your chance of jams.