The format for this group is Micetro, a competitive improv where the audience gives points to each group of performers, and actors get eliminated from the show as the evening progresses. I thought the actors did fairly well; there was some blocking going on in the scenes, but there was an awful lot of creative responses to the situations, and one actor did an amazing job with handling a variety of physical motions in one scene involving dismantling three different kinds of bombs. The impromptu sermon against the sin of dancing was also a lot of fun, and I really liked the "scene from nothing" which had two actors interacting without the aid of any sort of premise.
If I was going to be in Austin more reliably, I'd love to sign up for classes and start getting my own improv legs. I did some work in college with the Dramatech group and a lot of the writing for "The Show With No Name" was through an improv process. It's just incredibly fun to build off other people's ideas and construct a new mental space, and I'd love to do that on a regular basis.