I've heard good things about them, but have not tried one out for myself. I know T.J. just bought one, you might want to ask him, or wait for him to post up on here.
and you know I will especially since I get to make everyone jelouse with my total investment of $550 for a NIB M&P15A with YHM Drop in rails after I sold off the other extras I didn't want or need sad thing is I've spent more on optics and BUIS than I have in the rifle HaHaHa
So far I have about 800 rnd down the pipe and have only had 1 failure which was a serious death jam but it was caused by an out of spec reload that wasn't properly sized which wouldn't seat in the chamber
While sighting in my aimpoint I placed 5 shots center mass with all rounds touching from a supported position and another 6 rounds in center mass in the zero ring
I shot a rifle match last weekend with it and scored a total of -5.5 Pts down so yea it's accurate well made and sexy I'd post a pic but I'm using my iPhone to post but if you do a search of my post and you will find a few of my post with a pic of it
You made an excellent purchase so don't fret it and welcome to the club
Oh and I am about to order some new rails for it when I do if your interested I'd take $110 shipped for the YHM DI rails let me know if your interested
Personally once you get some glass I'd sell off the carry handle as you'll probably never use it again after that will decrease your investment about $100