Finally watched it last night. Great Predator film, and absolutely loved the setting. It was a treat to see a Predator that felt mysterious and threatening again.
Criticisms: Some of the CG elements took me out of the film, like the bear, and the over use of digital blood. Also, some of the dialogue was a bit awkward and out of place, but luckily this wasn't a dialogue driven film. This could have been improved by having the characters speak Comanche for the entire film, with English subtitles.
It's not a perfect film, but easily the 2nd or 3rd best in the series. Overall, I really enjoyed the main character's arc, the simplicity of the story told, and the menace of the Predator. I hope they don't tarnish it all with a stupid cash grab sequel.