I watched it last night, and I did enjoy a few parts of it. The Metroid-type alien that seemed to be parasitic and the spider woman were kind of cool.
That being said, the movie does have plenty of flaws. The character development is pretty weak, which is unfortunate since the cast isn't all that bad. They need better material to work with.
The excessive slo-mo also became (for me) somewhat unintentionally funny, particularly during the final battle, because it killed any of the proper tension those sorts of scenes should have. It's a film technique that, used properly, can be a handy addition (I mainly thought about how it was used much more effectively in some of the famous battles from the first Matrix movie). But one has to know how to effectively use it.
