For people over 200lbs its a big PITA, to the point that a lot of places won't take you if you're over 225. At that point it's hard on the instructor and hard on the gear. At around 250lbs, depending on the weight of the instructor, you come up on the max recommended exit weight. Most everything will still work fine, you just expose yourself to situations where the reserve might, say, explode if you do too many wrong things in a row. We just charge $1 per lbs to the student for everything over 200lbs and give it to the instructor. That way when a 250lbs 5' tall bowling ball of a woman walks in, everyone fights over her :)