I literally took 4 shots before the peep was installed, had it installed and I've been golden every since with my Vapor trails. Because of going with the new string and tubeless peep I also gained 15fps and got rid of that noise with the tube. I think you'll be really happy with the Vapors and tubeless peep. There are a couple tricks you can in an emergency if you draw back and your peep isn't aligned though.

If you're hunting and it's not aligned when you draw back, stay at full draw and just use your nose to nudge it a little into alignment. I haven't used mine for hunting yet since I just got the string put on about a month ago but I haven't had any rotation and I shoot several times a week.