I ended up with the MR920 (War Poet) when I was debating the glock 19 build vs buy route and for a factory ready option I'm a big fan. The looks are pretty sweet but there is a lot of great functionality in it as well. Decent trigger, ergos, multi platform optic cut that is much lower than the MOS and my favorite feature was the backstraps that adjust for actual grip angle rather than just big hand vs little hand. To me they also shoot 'flatter', like 36%... lol no real test but it does feel much better. They feel great in the hand and shoot even better. That's my experience anyway. But as mentioned before if you're already lusting after an option, you're just going to wish you had gotten it earlier.