I did have them in the RME TJ as mentioned. Here's a few of my impressions;
They can be difficult to install, especially with a bias ply tire with thick sidewalls. I was mounting Maxxis Creepy Crawlers on steel wheels in my garage. Having a tire machine would be nice, I did them all by hand.
One of my Stauns spun, after the tube lost air and the pressure leaked down to single digits. The leak was apparently thru the valve core and others have had a similar problem. It bothered me that 'new' tubes had leaking valve cores. This was 2-3 weeks after getting the TJ in wheeling shape and after a few trails. Since the Staun spun, I couldn't easily get air into/out of the tube & tire as one of the valve core 'flaps' was now covering the valve stem hole inside the wheel. Fixing that required breaking down the tire & wheel, which I never did... just dealt with the issue.
Other than that, I think they are a great, affordable option for DOT legal, inner & outer beadlocks. I don't know that I'd buy another set in the future though, I think I'd stick with a traditional outer beadlock wheel if I ever need beadlocks again.
I know the new owner of the RME TJ sold the tires & wheels, including the Stauns, if that says anything.