It's a very deep rooted anime. Animes that have to do with humanity and human mind and things, many people don't like. I personally loved RahXephon I've seen every episode. But I like animes that make you think. I still like the usual Bleach or OHSHC but still RahXephon is really good.
Probably one of the MOST confusing shows I've ever seen. Then again I missed an episode or two....or alot so I can't really say for sure. However, I did enjoy whatever episodes I was able to see.