I've been using it with the semi-hydro pots for a few years. Don't use it to start seedlings and maxillaria don't do well in it for me, but that could be something else. Haven't noticed much of a pattern to what doesn't work with it. The plastic pots only last a few years however and trying to clean up the prime agra is too much of a hassle to be worth it. It's not cheaper.
What I like about the semi-hydro is that I think it lets me have greater humidity in the plant area. I water twice a week and have a ceiling fan running 24/7, which evaporates it fairly fast. I put the semi-hydro pots in plastic trays that catch the overflow and spills.