I enjoyed this movie in no small part thanks to Hattie Smith's shorty shorts. There, I said it. But really, she is a talented young lady and I think we will be seeing much more of her. The acting overall was decent.
The story is interesting, there is enough material in there for a seriously scary horror video game and that's saying a lot.
It does suffer a little in the special effects area, maybe due to budget reasons. A sequel with a little more to spend on making the scary parts scarier would be a big success in my opinion.
The Axiom bears a lot of resemblance to one recent independent movie, and another not so recent one. But I guess revealing the names of those movies would count as a spoiler, because you would be able to guess what's going to happen.
I don't think you will be disappointed with this one.