Generally, I enjoyed it. I like the way Shaw plays with serious issues such as identity, self-delusion, social pressures etc. I think he demonstrates that comedy can be a very serious business and reminds us that humour can have an underlying darkness.
Despite this thematic depth, I found that the finale was a bit lame at the very end. It seems that Shaw, having fired off all of his thematic cannons with considerable effect ended using a pea-shooter as a finisher. That last line just doesn't work for me. But there's lots of fun before it.