spork-
I really like it. I've got a KAC M14 RAS on my M1A that the 552 is mounted on. I tried an A.R.M.S. #18 mount and a Smith Enterprise mount, but they didn't really didn't work too well with the EO-Tech. The A.R.M.S. mount sat low enough, but the empty cases would hang up on the EO-Tech as they were being ejected and cause a "stovepipe" jam. The Smith Enterprise Mount sat high enough to avoid jamming the rifle but also sat too high for a decent cheek-weld on the stock. I did like the way I could use the iron sights while the EO-Tech was still on the rifle, though. Both of those mounts are fine for regular scopes but not with the EO-Tech. It took me over a year and half of experimenting until I found the right set-up. The KAC M14 RAS is a great mounting system and I highly recommend it to anyone looking to put any kind of optic on their M1A. Just keep in mind that it works only with USGI-profile barrels. It also is still just a teeny bit high, but I was able to overcome the issue by putting a Blackhawk strap-on cheekpiece on my rifle. Works great. This is my "Go To" rifle should the "SHTF"...
The EO-Tech provides FAST target acquisition. Should the EO-Tech go down, I can remove it quickly and I'm good-to-go with the iron sights.
Should be a shit-hot coyote rig. I plan on trying it out on them this fall.