I've maintained for about 6 months
Sides - none whatsoever (slightly lowered libido which I'd hardly call a side... I think people who get this "brain fog" or "loss of manhood" or any other vague sides are just full of sh*t.. Get on a tricyclic or a betablocker (not to mention the stronger opioid analgesics) then you can talk to me about sides)
regrowth - none at all, I don't think many people at all regrow on Finasteride, so don't get your hopes up. Try Minoxidil, I myself don't have patience to rub stuff on my scalp every evening, but that's just me (yeah, I'd much rather just pop pills as I do it anyway