A fairly good episode as far as Season 1 goes, but definitely one of the worst Q episodes. John de Lancie was great as always and the scenes on the planet and Q's banter with Picard were fun.
Denise Crosby... well, you summed it up well I think. One of the worst performances, one of the worst scenes and some of the worst lines in the franchise. It was so cringe-worthy that I couldn't help but laugh.
Lt. Yar aside though, I enjoy every Q episode and this was a decent enough episode.