Terry---No-Peep user here and love it.I will never go back to a regular peep again.Like Dave said,its either a love or hate thing with the NP and it seems to be a half-half thing with the members on this board.
The only negative about the NP that I can think of is setting it up,a real pain your first time around.It will get easier your second time if you ever replace bows or just want to tinker with your current bow.Best advise I can give is have a friend help with the bow at full draw for the last final adjustments.Move in VERY small incresments,I mean very small,its touchy .
I placed mine under the pins and found it to perform better in this fashion.With a rock solid anchor,which you will acquire with the NP is very accurate,especially in hunting situations and at hunting distances.
Biggest positive with the NP is no peep on the string to twist,blur vision during low light conditions.Rock solid anchor,very consistent,and takes weight off string making for a faster arrow flight.
I have weighed all the possibilities when considering purchasing a NP and the positives were far greater then the negatives.Very glad I went this route and will never look back.
I am going to Toronto this summer with the family for a week to attend a wedding,we can get together along with nubo and set the bows up.
If there is anything you need just holler.