Another NP user here and I love it.Very durable.
I shoot mine to 40 yards and find myself more accurate with it then my peep.I have had one on my bows for a little over 2 years now and would never go back to a peep or kisser.
Some advantages to the NP is you get the stuff off your string,making for a faster arrow flight and you will always have a consistent anchor,especially shooting out of a tree,bending at the waist.
Its definately a pain to set it up your first time.
Disadvantages are----If you want to put a new site on then it will have to be set up again,being that it is mounted on the riser with the site holes.
You will find alot of guys here shoot them and will get a lot of responses,likes and dislikes.Do a search on the No-Peep here and you will find alot of info .
Try one out,you wont be dissapointed.