First of all, the dialog. I don't know if it's Matthew McConaughey's inability to enunciate or an inexperienced audio engineer but numerous times during the movie I had to ask "what did he just say?". I spent more time focusing on what was being said and less on the actual story. That was a real disappointment.

Second- and I don't know if this was intentional or not- but there's absolutely no reference to dates, times, or places. From the very beginning of the movie I wasn't sure when- or where- we were. Kansas? Colorado? 2150 AD? It was an unnecessary distraction.

Third- continuity and logic. I'm not describing any spoilers for those that haven't seen the film but there are significant lapses in continuity and illogical assumptions or directions that are so unbelievable- even for a science fiction story. It almost felt like there was a lot more to the film that was edited out.

Finally, it was just too long and frankly, Matthew McConaughey is not THAT great an actor. Yes, there was one particular scene that was well beyond anything you've likely seen him do before but that wasn't enough to prop up the rest of the film.

Anyway...5/10 but mostly for the special effects because those really were the star of the show.