What is bad about this episode? Erm, either the line "and wear something trashy...er" or the costuming that doesn't match the line (she's wearing a twin-set for heaven's sake) or the continual characterisation of Cordelia as slutty (or at least being slutty in appearance) when, if we must sling mud, Buffy's outfits are much much worse - witness the spaghetti strap top she wears when she attacks Jenny in the classroom for a start. Actually, it is clearly all three points, it's nasty and not a little misogynistic which seems a weird thing to write.
Otherwise, brilliant. Even Buffy's inability to kill Angel which makes her answerable for many deaths (notably Jenny's) is interesting.