I run the EOTech XPS2-0 on my FNH SLP Mark1. Love it. Haven't had so much fun with a shotgun since I mounted it. The XPS2 is attached to the cantilever barrel. Haven't used it for hunting (probably won't) but have put a lot of rounds down range during the last 4 day training course. Got another one coming up later this year.
I also have a Burris FastFire II but haven't tried it yet. Will do so prior to the next course. Got to admit that the 65 MOA circle in the EOTech makes it easy to get on target. The 1 MOA dot is perfect for slug shots assuming you have time to aim, else, put the target in the middle of the circle. Works either way.