halo bv35, reloader b2. They also work very great, but neither is as gentle on paint as the pulse.
alias with almost $1000 worth of ups, too long to list here
It is far more gentle on paint than any other loader I have ever used.
I have found no weaknesses in mine yet.
Thus loader is amazing. I cannot begin to describe how impresses I am with it. The very first time I tested it, I used a 4 month old bag of paint that was sitting in my closet to test how gentle this loader really was since it claimed to be. Any other loader would have blended these paintballs, but I fired all 500 of them using the pulse and rf and not a single one of them broke in either the pulse or the marker. No breaks at all in fact, not even a barrel. This paint was brittle enough to break from being dropped as low as a ft above the concrete. I was using the orange anarchy paint, so you know how fragiile that is fresh, well old is super brittle. But this pulse fed my alias at a rate of over 20bps w/o chopping so I am very impressed. I have been using this pulse for just over a month now and have put about 10,000 rds through it so far and not a single break or chop has taken place. I could never have said this about my halo or reloader, although they served me well too, but I would have to put up with broken paint here and there. Especially with the reloader b.
The pulse is by far the highest performing loaderr out there. Not just for the rf and its speed, but the fact that it can feed that fast and is so gentle on paint you won't ever have to worry about using fragile paint anymore.