The movie itself is a weird mix of many things and it is not for everybody. It's a head thing (pun intended) and might strike you the wrong way. But if you are into the idea of the fantastic and have no issues with a bit of skin, then you might be positively surprised by this science fiction/fantasy entry.
The acting might seem wooden at times and the main character might be sliding into the territory of "don't do that"-yell from the audience, but overall the switch between worlds and the interaction feels real (which is funny if you think about it). The movie itself is not made as a comedy though, it is more structured like a drama/thriller. If you want to see something different, go ahead