The writing on the show is terrific, as usual. The famous musical episode is very impressive, though I thought the last couple of numbers were not as strong as the others. The evil nerds are fun. I don't exactly recommend it as uplifting to watch when you're feeling crummy to begin with, but now I'm deep enough into it to want to finish.
With only one season of Buffy left, I'm hoping this means that I only have to get sick one more time for the rest of my life.