Ok, watched it again today, it had been a long time since I'd seen it, I still believe GL is nowhere near as bad as many people say it is. The CG overall IMO is very solid, the costume looks really cool and great, the mask looks weird at first, but I feel in the darker scenes, it actually works pretty well, the constructs look great, Oa looks good, the Guardians look good, Parallax looks good too. Kilowog looks good, well, overall, it looks pretty good, the beginning sequence where they find Parallax has some pretty shaky CG though, but that's the only screw up IMO.
Ryan Reynolds is a great Hal Jordan (once again, imo ^^ ), Lively is good, Sarsgaard is hamming it up but is fun to watch, the rest of the cast is okay, Strong is still great as Sinestro.
The big weakness of the movie, as it's been said many times, is that it's too rushed, not enough GL Corps, not enough time on Oa, not enough training, not as much action as I would like.
Otherwise, the movie is funny when it needs to be, the constructs look awesome, the action sequences are really cool (especially the ending, or the fight in the city). It could have been better, I think that Campbell is an odd choice and is one of the reasons why the movie is not great when it should have been.
But I think the movie is good, like a 6,5/10. I hope they go with a sequel when they plan on doing Justice League, Hal Jordan needs more dvpt, needs more movies, they cant reboot this, they need to keep Ryan and go from here.