I have noticed that many of you have posted routines that encourage heavy sets that go to a percentage of muscular failure- but not all of the way.

I'm sorry, but this makes no sense to me. It is my opinion that to stress the muscle best and most efficiently, one's heavy set(s) should go to the complete muscular failure point and beyond.

I am just curious if any of you who espouse the percentage ideas have found any decent gains to be made from this method...