Over at prometheusforum.net they`ve assembled some tweets from critics that have seen the movie.
This collection is a Google translate from French critics so some of the more colourful descpritions may be lost in translation but you`ll get the general idea. No spoilers, just personal opinions and guess what, some people really liked it and some did`nt. How surprising, critics criticising. I`ll reserve judgement until after I see it and I`m guessing so will sc-fi fans.
You can read the thread here