Is the M&P optics ready?
I have a Vortex Venom on a Performance Center M&P9L Pro Series C.O.R.E. I chose it because this is a target gun, not a carry gun, so I wanted the 3 MOA with a battery that could be changed without removing the sight. It supposedly doesn't co-witness with the tall sights I have. Although it appears to be very close, fixed sights wasn't a concern for me. It won't "shake awake".
It works great, but I haven't shot it a lot, and have not tried to really dial it in yet. So I have no idea how well it will hold up. But its definitely an improvement over open sights for range work.
I wanted the Leupold Delta point Pro, but it wouldn't mount of the M&P without grinding some off the sight case, or using a mount that was stupid expensive. They may have addressed that by now, I don't know.
I also have a FastFire III on a Ruger Mark IV Competition, but I haven't even shot it yet.
I'm not onboard yet for a red dot on a carry gun, so I'm just using them for range work.