I enjoyed this episode much more than the previous one. It was quite fun. Sure, holodeck episodes aren't the most original idea in Star Trek, but they're almost always good, and I think this episode was worth the slight fudging of canon.
Also, seeing the "Last Frontier" bits and how well they captured the TOS feel makes me think, "Why do they need to make modern Trek so fancy? Why can't we have cheap-looking sets again?" Also, I think this is one of the better Paul Wesley performances in this show.
I was relieved to find they didn't go to far with the meta this episode. So many of the clips and dialogues of this episode I saw in the initial trailers made me worry this season was going to do a multiverse plot or venture a bit too far beyond the fourth wall.
The only thing is the Spock/La'an romance is driving me nuts. Neither is emotionally ready, and Spock STILL has a fiance. It's painful to watch it knowing that it's almost certainly doomed. I don't necessarily mind them acknowledging that they have feelings to each other, but I would have thought there would be a mutual desire to keep it platonic. In the end though, at least dancing isn't Vulcan neuropressure - as I get further into Enterprise, I kind of wonder how Rick Berman has evaded the trunk of my car for so long.