I find that it is very easy to peak around corners and provides a wider field of view. It truly does feed faster if you use it in bursts. I like to shoot it upside down while in a bunker if there is a gap at the bottom... I easily piss people off doing that!
Concidering I have a Shocker (works at 200psi, no recoil at all!) it feeds rather inconsitently. I sometimes have to push the botton to "re-prime" it which can be an annoyance if you are in the middle of the action. Also, i found that the hoses can come loose and you lose a lot of balls. I used some electrician tape and never had a problem again. So the only really bad part is that it won't feed tooo well on a low-recoil, high-end electro like the angels, shockers or defiants.
Overall it is a pretty good addition. Don't listen to that crap that it is unbalanced and heavy... it's just because the people who say that are weak! I wouldn't reccommend the product unless you have a gun like a 'mag or 'cocker with a little more recoil. The sensitivity of it is just not good enough if you have a low-recoil electronic gun. However, I'm sure that there will be future imporvements to fix this problem, there is plenty of room for them at this point. The best advice I can give is that you try it out yourself.