had one myself and never had a problem. It was modified tho. velcro replaced by tabs on the riser covers, tabs on the reserve flap, tabs on the main pin protection flap and velcro on the inside of the closing flap on the right and on the part of the bridle that would fit under there.
never had any flap open what ever move i made, but made only 200 jumps on it.
so whatever you are comfortable with =]