When I bought my new Switchback this fall and was buying all the sights and setup, the dealer put the hard sell on these sights. Said I would be able to shoot later and see better.
So, I tried one. Gave it away after about a month. For me, I felt it obscured too much of the target at 30 and 40 yards. As far as shooting later, I don't feel it met that goal either. Just didn't provide me as much fine detail as I was looking for and while the groups at 20 yards were good, at 30 and 40 I didn't feel that the sight was as good as the bow.
Went back to a peep and my groups tightend up greatly and I could clearly see the rest of the target at 40 yards. Not that I take shots at deer at 50 yards, but I do shoot a few arrows at 50 during each practice. With a good peep, I can easily keep 5 out of 5 in a 5 inch circle at 50, with the hindsight, I couldn't even see a 5 inch circle.
BTW, the guy I gave it too was super eager to try it. He had heard about it and thought it was just the ticket for him. He gave it away too after two weeks.
Hopefully others have better experiences.
Hank