So clever (although time-travel always makes my brain ache, in a good way -- is Harry still going to be born?), and beautifully-written, and wonderfully-paced and characterized. Snape and Harry are excellent, and all the secondary characters are spot-on, too. You've created such a full, complex world in both time-lines. Your young!Snape is so believable, and I like that he and Harry seem to have a relationship of equals and that, even though they have their troubles, neither of them is psychologically tortured or broken. A fine job.