[NB mild spoiler]
Atmospheric, ominous, beautiful cinematography and music. But what's it about!?
I think you have to be able to suspend your analytical self to appreciate this film, because otherwise you get bogged down in trying to work out what's happening and why. Ultimately, I think Solaris is like a big "what if?" What if someone dead from your past could come back?
Clooney is brilliant, a completely different person from his Ocean's 11 franchise. He represents the grief of bereavement. grief that passes all understanding. This may be scifi, it may be psychological, but at the end of the day, it's about grief.