I never saw the 2009 one. I saw the trailer for this one and it looked interesting. I kinda want to see it, but if I'm going to I want to watch the other first.
I don't think it looks very good, but I haven't been a die hard Star Trek fan since I was seven. I remember sitting on my dad's lap, watching it late at night, and loving it, but none of the new Star Trek stuff has the same "magic" that I remember from when I was a kid. It's actually kind of a shame because I've seen newer Star Trek stuff and it's definitely good, but I just don't like it.
I have conflicted feelings regarding this movie. On the one hand, nu!Trek revived the fandom; breathed fresh air into it, so to speak. On the other hand, J.J. Abrams is not above twisting canon to suit his whims. This can be understandably annoying to longtime fans. It's an alternate universe. It does not reflect Roddenberry's canonical material. Keep the foregoing in mind, and I suppose it's alright. Not my cup of tea perhaps, but I won't condemn those who like it. Anyways, trekkies need not worry any further. Abrams has reunited with his long- lost love, Star Wars. If his brew hast nauseated you, rejoice! It's doubtful that he'll continue on with Star Trek after this.