If you're shooting your bows at less than 70 pounds and/or less than 30" draw, then you most likely won't have any immediate problem. If you ARE shooting 70 pounds and 30" draw, then I'd definitely go by their guidelines. PSE's have had a reputation for a number of years now. "Pull Shoot Explode" has been around since the 80's!

I think a properly set up PSE makes for a good, solid bow, but they don't take kindly to abuse. Ignore their arrow weight recommendation at your own risk.