No spoilers here, just a resounding thumbs down. Take a pass.
The actors do a very creditable job of creating young versions of all the familiar characters from Classic Trek, but the writing sucks start to finish, and the science fictional aspects are ludicrous even for STAR TREK. Fans of the old show might like the film... but then again, maybe not, since it's a "reboot" (Hollywoodese for "retcon") and pisses all over the original continuity.
Me, I think they should just let this tired, tired franchise die. STAR WARS too. I don't ever need to see another wookie, or another klingon. (They won't, of course. Not so long as there's one more nickle to be made. I know how Hollywood works).
I love SF, and I love space opera, but can't we have some new characters in a new universe? Even BATTLESTAR GALACTICA was a retread, albeit a much more interesting one than anything Trek or SW has done in decades. We did have FIREFLY, short lived as it was... but there's room for more. Let's have television versions of Honor Harrington and Miles Vorkosigan. Let's have someone film the Praxis series by Walter Jon Williams, the best space opera I've read in years. Let's have anything that isn't Trek or STAR WARS.
If they really must remake old shows, screw it, let them remake Tom Corbett, Space Cadet, or Rocky Jones, Space Ranger. Pinto Vortando rules!!!