I am a long time Aimpoint guy. Got a compXD, CompM4, T1, and R1 micros. Love-em!
Ive been looking at the Trijicon RMRs too for a while for my pistol. I have a friend who has the dual illumination 7MOA version and I've ordered my own version (RM07 = 6.5MOA dot with manual adjustable brightness) which runs on a 2032 battery, I'm still awaiting delivery as they are backordered. Depending on the model you can get the following dot sizes 3.5, 6.25, 7, 8, 9, and 13MOA dot or a 12.9 Triangle reticle. Ive found my friend's to be pretty indestructible during training evolutions. The sight picture is crisp and clear but its obviously a small optic window due to the sight's small size. The dual illumination models are amber dots and the battery models are red dots. Its up to you whether you like battery or no battery. I'm used to batteries and I wanted the adjustable brightness for range sessions so I got the RM07 model and for my eyes the red dot is easier to see against some backgorunds than the amber dot. The RMR is capable on a rifle (like my buddy's setup on his AR) or shotgun or revolver or pistol. The only downside to these little reflex sights is its not like a scope so there arent any "lens caps" to protect the lens, some other companies make little hoods than sit over the sight to protect it. I haven't seen a cover fromt Trijicon so you just have to make sure your not storing the firearm where the sight might get scratched. Also if you need mounts, there are tons of mounts for the RMRs ranging from weaver and picatinny to AK47 and AR platform, quick release models, and for pistols and shotguns. If you have the money to try one and you like the look of them then I think you will enjoy the purchase.