Just watched it! Here`s my short thoughts. Some Mild Spoilers.

It really isn't a good action thriller.

If you thought Prometheus was amazing then you might like it.

But I have to agree about the leaky plot and complete lack of tension. A bit of body horror but The Thing (original) and Alien did it better.

I thought the acting and dialogue were poor also.

Ridley Scott used to be my favourite director. Alien, Blade Runner, Black Hawk Down, Gladiator, Kingdom of Heaven. So varied and talented, such use of light.

Now I hope he's just cashing in quickly before he retires instead of going demented or something. 

A great shame we lost Neil Blomkamps film for this.