Finally got my hands on an Aimpoint ACRO P2. It's on a Glock 17 MOS. I haven't shot it yet, but initial impressions are that the unit is not as bulky as I envisioned. It's more bulky than an RMR06, but the overall window seems larger, at least top to bottom. The dot seems clear, like their rifle red dots (T2, CompM5, PRO, etc). I have the Ameriglo suppressor height sights and the sights are in the lower (about) 1/4 or less in the window, which I like.
Not sure if I will be able to shoot for a couple of weeks. Really looking forward to trying the whole setup. I'll have a more basic Glock 17 with EPS to compare with soon, for a more streamlined setup than the bulky ACRO.