I actually liked this episode, it had this mix of being funny, kind of surreal, with darker undercurrents that are what drew me to the series in the first place. It definitely had the feel of being filler but it was good filler in my opinion.
Buffy looked so cute in her uniform and I liked the scenes at DMP, the creepy training video(which was able to be both hilarious and creepy at the same time), and whenever Buffy would ask what the secret ingredient was they'd say "it's a meat process", for some reason i thought that was hilarious. Vague much?
I don't know what Amy thought she was doing, but i can't imagine she thought she had Willow's best interests in mind. It doesn't matter whether or not Willow enjoyed the effects of the spell, Amy knew she had given up magick for her own good. I definitely think Amy is trying to drag Willow down with her in her own misery (and let's face it, Amy does seem pretty miserable). I don't think she's a very sympathetic character, but she sure is interesting.