While the special effects were very well done, I found the plot to be simplistic and the acting pretty lame (not counting young Spock who was supposed to be wooden).
What was up with the pseudo-romance of young Spock and Uhuru? Suddenly they're necking on the transporter pad, but there was no introduction to them starting to have feelings for one another.
Continuity: the ball was dropped again. For instance, How can Spock's mother be alive in the original series and in movie #4 when they kill her here? Also, the bridge of this Enterprise was much more advanced looking than the original series and better than the one in Next Generation. And finally, nowhere did they show how or why young Spock and Kirk would become friends. it was left up to a cameo appearance by Leonard Nemoy as a much older Spock to TELL young Spock that he and Kirk will be lifelong friends. Why didn't young Spock question that statement, based upon their interaction up to that point?
Not to mention the destruction of the planet Vulcan, which gets visited and talked about in every television series. Within a couple of Earth years some 30K surviving Vulcans colonize a new planet and totally rebuild their civilization? I didn't buy it.
It's a good thing I saw it at a matinee, because the $10 prime time ticket price would not have been worth it.