I have one of their semis. A great shotgun in my opinion--light, easy to handle, solid parts and action, low recoil, only time it's ever failed is with bad shotshells--some Winchester Super X where the hulls were expanding so much that they were catching on the ejection port. Every other brand worked fine. The mechanism is well designed too--it's basically very much like a pump-action, but one where the pump is gas-driven.
Granted I've never used another shotgun, but then I haven't really wanted to. This one's killed lots of pests and never once been problematic.