I got the Evlution 2 with my Spyder E-99. Personally i like it quite a bit, even fully auto i cant outshoot the loader (fully auto is 13 bps i think it was). Only thing is the back part where the batteries go keeps coming off, making it seem like there are no batteries. Not sure if this happens to all of em, but i just used some electrical tape to tape it up.
Its easy to take apart and clean. Putting back together is just as easy, but can be a bit irritating if you dont have a third hand. Just takes a little longer, but still not hard.