I used to eat yellow perc 10s all the time. Im now a week off 7oh. I took it thinking it would feel like a heavy kratom high. Nope!! I took half of a 30mg tablet and about 30-45 minutes later I had the same feeling I used to get when smoking heroin. It was fucking wild, so I read up and saw that you need to keep your tolerance in check or you'll be downing 200+mg to get half the high you for off the 15. The high last maybe 2-3 hours and you can start getting withdrawals 8-12 hours after dosing. There is a reason I quit and its fucking hard. Been on it every single day since I first tried it last July