The banter was fun, but the first visual impression of Chekov gets to be a horrible wig.
I wonder if they name dropped Klingons and not Romulans because a former Romulan was playing a Vulcan here and they didn't wanna draw attention to that.
A really good episode, dealing with a subject matter that many have wondered about ever since Spock first showed up on screen, what are Vulcans like, what's their planet like, what's their culture like, what's their language like... but also well paced and structured, first a mystery focused on figuring out what's wrong with Spock that leads into the revelations about both the inner and outer lives of Vulcans, and some fisticuffs for the finale.
The one extremely crappy angle of this episode is that Vulcans are shown to treat women just like the Ferengi. This is somewhat mitigated by everyone geeking out about how awesome T'Pau is(a role that could have easily (and usually) been an old white dude), but unfortunately she also literally says the line that the woman becomes the man's property. Ugh...
Some notes:
While Kirk usually talks computers to death, Spock uses the logical smashing approach instead.
Vulcans do surprisingly shoddy metalwork, the lirpa and the gong managed to break during the fight.
Why wasn't Spock's sister at the wedding?