This is coming from me, a FASTA owner. The Kingman FASTA has been taking a lot of crap lately. That is why i'm making this thread.
The FASTA is not a TRUE force fed loader. It uses the methods used in the ricochet hoppers, except improved, it uses a small pad in the raceway to sense when a ball falls. After the ball passes it forces more paintballs down the stack. Its the lightest force fed hopper, weighing in at one pound with batteries. It is also one of the most durable hoppers out there and the feed neck is very strong. The FASTA was proved in a youtube video to feed at 24 BPS on gun.
Some of the CONS!!!: Not true force feed, some people think its ugly, and bad resale
I hope this has helped you in your decision.