I just installed my NO PEEP the other day and have shot twice with it (about 60 to 80 arrows a trip). At the same time I have also switch from 40 plus years of shooting finger to now using a release. I did both these at once.
It didn' t happen instantly but the second time I was out shooting with the no peep. I shot a couple of nocks off when fine tuning the sight. Not unusual for me ( I don' t always shoot at the same spot on the target except when sighting in )but it proved to me that it works with little trianing ajustment.
I like the no peep.