I love this fic and this pairing so much! This is by far my favourite crossover ever, with a pairing, or otherwise.
While I do love crossovers, I usually really can't adjust to my fav couples being spilt, and I want them to run back into there correct order(OCD I know). I don't think that happened once in this fic, you wrote the pairing so naturally, by the end they were practically OTP (JJ & Lindsay who?), and dealt with the other characters feelings so well that even when they were hurt/upset they didn't come off as jilted.
Oh and I loved Jill, Claire and Garcia!