Wow! I can't ask for more than what JJ Abrams has served up. Star Trek is completely unlike any of the other previous films, which were beholden to the bevy of characters from the television shows. Abrams has stripped the Original Series characters down to extreme basics, and built us back up one by one.
Obviously, the movie centres on James T. Kirk's life, but it begins before his birth on the USS Kelvin, a small ship where George S. Kirk is a Lieutenant, and his wife is very pregnant. The Kelvin is attacked by Nero, a Romulan warped back in time by a black hole's event horizon from over 150 years in the future. Even though Nero is only commanding a mining vessel, it is far larger and more powerful than the Kelvin, which is badly damaged. The Captain of the Kelvin takes a shuttlecraft over to surrender to ask Nero for terms, leaving Kirk in charge.
The captain is slain by Nero, and the Romulan attacks the Kelvin with the intent to destroy it. Kirk orders an evacuation and sets the ship's autopilot to ram the enemy vessel, so that the shuttlepods might escape. However, as his wife (in labour) is evacuated, Kirk realizes that the Kelvin's autopilot has been disabled. He sets a collision course manually, and orders the shuttlepod with his wife to leave. As the shuttlepod is departing, Kirk does his best to hold off the enemy ship, as his wife gives birth. As the Kelvin approaches Nero's ship, George Kirk and his wife discuss what to name the child: James Tiberius Kirk. Then the Kelvin rams Nero's ship, cutting off George's words. I can honestly say this was the first time I ever cried at a Star Trek movie, and it was within the first five minutes!
Spock is the secondary focus of this movie, and Zachary Quinto was perfect in the role. He looks like Spock, and he acts like Spock, with those little quirks that suggest Spock is a hint more human underneath. I don't want to give away too much here, but I think the performance was absolutely as good as could be expected.
I was upset that Scotty didn't get as much screen time as he should have. Simon Pegg filled the role quite nicely, and he was worth quite a few laughs. Similarly, I thought Karl Urban was great as McCoy. Probably, other than Spock, he was the best at emulating the performance of his predecessor. Given that DeForest Kelley is dead, it is even more impressive than Quinto, who got the chance to meet and speak with Nimoy before he filmed as Spock.
Overall, the movie is significantly different. There's a lot more emphasis on the action elements of the movie than any other Star Trek movie. The only other one that came close in this regard was First Contact. The character conflict was acceptable, but nicely resolved by the end of the film. The visual updates to the Enterprise's bridge and decks were great. The external graphics show a Constitution-class ship similar to the refit we saw in the TOS films, with the extra angles of the refitted Enterprise, and later the Enterprise-A, which I prefer. Seeing the Enterprise (complete) for the first time was a visual marvel. The graphics were really really good in this movie, probably the best of any movie I've ever seen.
The storyline was complex but well explained. It did rely on time travel but I think it was necessary in this case to keep the fanboys happy and make sense. The way the writers have chosen to reboot the franchise gives them the ability to write in a vacuum from the other events, though one could suggest that some things may not happen - history, however, still gave Jim Kirk the Enterprise in the end.
And Chekov still pronounces his Vs like Ws. "Ensign Pavel Chekov, authorization code Four-Bravo-Wictor-Wictor." "Authorization denied."
JJ Abrams hasn't directed much in the grand scheme of things. In fact, the only other movie he's directed was the lackluster Mission: Impossible III. But he's *finally* brought Star Trek's 23rd century into the 21st century. It's updated, it's on the edge, but it still has the Star Trek feel: that Kirk, Spock and company will still boldly go where no one has gone before.