This movie is a-head of it's time. Probably the single most under-rated movie of all time, or at least in the top 5. You don't have to like the Monkees to appreciate this movie, since it has little to do with the TV show. It's a very deep movie, and it makes you think. At times it might look a little silly, but if you think that then you aren't seeing the bigger picture of what they are actually saying, you are just looking at it at face value. Don't do that with this movie. Take nothing for granted. It's an experience. You might have to watch it a second or third time before you get it.
This was a great movie. Unpretentious, Fun, easy to follow, but has a lot to take in as well, great special fx, I enjoyed this movie more than any Star Wars film ever. I'm going to see this movie like 6-10 more times. It was as well made as the new Trek, and Ryan Renolds reminded me of Kirk from the new Trek movie. Green Lantern is better than Thor and X-men first class combined.
OA looked nice. The Guardians looked cool, I liked seeing the old Green Lanterns from the comic, and the movie was close enough to the comic.
Wait a bit after the end to see a bonus little part with Sinestro. If I had any problem it is with the costumes, why can't Hollywood just make a simple superhero suit? Over all I give it 5 stars. I'd give it 6 if I could.