Solaris is based on the Stanislaw Lem novel. Owning both the 1972 Tarkovsky movie and the Soderbergh version of Solaris, comparisons between the two films are inevitable. However, I think it is important to treat the two movies as individual films.
The plot is based around a space station orbiting around the planet Solaris, where the astronauts and a security team have either gone missing or are not very coherent. One of the astronauts aboard the space station contacts psychiatrist Chris Kelvin (Clooney) who flies off to investigate. He soon discovers some amazing developments that offer him a second chance, and questions how far anyone will go to grab that chance.
I feel that Soderbergh really couldn't win however he made this film. This may be deserved to a degree as remakes are notoriously easy to criticise, and very rarely a good idea. This is one remake that may have some justification, the original film is nearly three hours long, and the shorter version may encourage some viewers to seek out the Tarkovsky version as a result of watching, which has to be a good thing. This version could be viewed as a companion piece or an introduction of sorts to the Tarkovsky version, although it is a fine film in it's own right.
Solaris is criticised at the same time for being boring, too short, too complicated, and too simplified. It is also derided for having two very good looking leading actors. At 90 minutes it never has time to become boring, and while the pace is never fast, the viewer must have a very short attention span to get even close to boredom. The character development is achieved by flashback, which in the important dream sequences makes perfect sense, and releases information slowly but very interestingly. Solaris needs to be watched closely to piece together all the threads of the plot, but is not overly complicated. Some information is kept to a minimum, the viewer has to make some assumptions and use some imagination, which may be a bridge to far for some. Clooney and Natascha McElhone make excellent leads in my opinion, and anyone who says that Clooney can't act should watch more of his films.
The special effects are beautiful, but not overused. The sets and locations are very sparse and futuristic while still being recognisable and possible. The music by Cliff Martinez is excellent and captures the mood brilliantly.
Overall Solaris is a very moody, almost hypnotic film that requires some effort. The acting and plot development grab you and means that you keep watching to see how things develop if someone is given a second chance, and the implications that it brings.