Liked:
* The visual effects, especially Spock's 2001-inspired astronaut journey and the ship passing through that crazy multi-coloured landscape
* Possessed Illya referring to the captain as "Kirk unit"...I thought that was adorable
* Kirk basically busting out his Corbomite Manuever tactic on possessed Illya - great character moment for Kirk (in a movie that unfortunately had very few character moments) and a cool callback to events of the series
* McCoy's grumpiness upon being beamed aboard...another rare and welcome character moment
* The ending - I thought the reveal of the probe's true nature was satisfyingly creative, unexpected, and logical
Didn't like:
* Many of the beginning sequences like Spock on Vulcan and Kirk being brought to the ship, which dragged on and on
* The general pace throughout the movie
* How stiff, bland, and lifeless a lot of the characters seemed to be. It was weird to see Kirk so deadly serious the whole time and lacking the charm he had on the series
* The excessive reaction shots
* Dekker being so whiny (although it was understandable at times)
* Illya, before she was possessed (boring and irritating)