No one seems to be chiming in, so I'll toss in my 2 cents... These have been around for a while. If I understand the history correctly, Coyote was an importer for the Stauns previously, which were around in the mid 2000s at least, so it seems like they've got a solid history with the product. No personal experience, so all I've got is feedback I've seen on random forum posts over the years: worth what you pay for it. That said, it seems like most people who point out the negatives don't have any experience with them, while most people who buy them seem happy.
I didn't look at options like this when I beadlocked mine, because I wanted to go to 17s anyway for better tire options... it just made sense at the time to go ahead with a beadlock wheel. That said, if I were happy with the tire and wheel combo I had, I wouldn't be afraid to give these a try. They're relatively cheap, considering the cost of tires and wheels at this point!
Side note, I think I need to buy a set of their tire deflators. They look pretty nice.