I would rate the special effects a solid 3.5 out of 5. I would rate the spots they put the extra work into the cgi a 4.5 out of 5. It was really too bad they were handicapped by the budget and the unknown of being the first 40k movie.
The story was good but nothing flashy. My personal thought is some of Dan's story was scraped because of budget. My 2 cents. It moved along nicely but didn't go too indeth into characters. I give the story a 3 out of 5.
The action was awesome. Blood and gore all over. The fact you get to see space marines move and fight is sweet. The speeder is awesome and landscape is very nice. Fight scenes get a solid 4.5.
Overall this is a solid movie to start the 40k series. I really hope everyone goes out and picks this up and supports the idea of further 40k movies. I think it was definitely worth my $40 and since that included the shipping from England, even better. So go out and pick this one up. Grab some popcorn or just throw it on in the background of one of your games.