Quite silly but built up to an exciting conclusion. How idiotic was the crew member at the start taking his glove off? I know that The Next Generation did a sequel to this and I always thought that was one of the sillier TNG episodes, but it's nowhere near the levels of this! Sulu running around with a fencing sword was pretty extreme, but Spock's breakdown was done well.
I'm assuming the timewarp formula figured out at the end is what Star Trek IV uses?