I saw Untrained
and I think it could have been much better. Without the characters the show is just two men doing dance exercises and two men doing dance exercises poorly. About half way in the characters began to emerge and it began to be interesting, and then it was all over. It didn't need to be longer, it needed to start sooner and not to spend half the show warming up.
Also, it was the first night, so the audience was full of friends of the performers and sections tried valiantly to applaud every action on stage - which didn't help.