Dangerous Power G4, Invert Too, Ninja Tank, CP barrel
None so far!
I am impressed with this hopper, and especially for the price. I've got about 2 cases through it with no issues yet, and I don't anticipate any. It's not noisy, it's not too heavy, it's not difficult to program (go to youtube if you can't figure out how), and I love that it didn't cost me an arm and leg. You can really adjust this hopper to fit your playing style and rate of fire. I wish it came in more than one color, but that's just me being whiny. This hopper is sick.
Great price, even better performance, and not too battery hungry, no complaints from me. You won't be disappointed.