I reread this the other day and upon finishing it I immediately wanted to pick it up again. Girl Friends is, to me, a yuri hall of famer. First-time enjoyment may partially be related to age (e.g. for teen me this story was stupidly relatable), but it also just a very well-rounded story. Even with newer series this one has not lost its charm.
Honestly, with only a small handful of exceptions, I would say all of the author's work is worth reading and rereading.