The CGI didn't bother me at all. And for those who say it's the "worst effects ever" in a movie like this - seriously - go watch 'Lockout.' Effects have never really bothered me unless it looked like a Playstation 1 video game. Out of the millions of movies I've seen - in terms of effects, I'd say it was moderate. They weren't bad at all, they weren't great, they were serviceable or in the middle range of all of the movies out there.
You're bad CGI!
Seriously, I rarely go 'worst ever' but yes, I'm very adamant and stubborn about this one film. Again, I still enjoy the crap out of it and I understand it's a lower budget film.