Ive gone through quite a few optics and mounts to try to find the right combination, height, ease of leveling and mounting, functionality, available attachments, weight, etc. For AR15 platforms, this out performs everything. Leveling the optic is by far the easiest and most precise. Its on par with some of the light 1 piece scope mounts as well, which is always a plus.
I have a NF 2.5-10x24 sitting in it right now with a MRDS mounted 12 o'clock on the forward ring, with the lower mounting height (compared to the traditional 1.5") it puts the MRDS at perfect height to still obtain a cheek weld for both. Youre able to maintain cheek weld and still be able to look at your elevation turret.
These mounts were really well thought out with every detail having a purpose. My only complaint, which is inconsequential, is that I wish it had an internal bubble level, like the rest of the ISMS mounts.