I have been eyeing them for a good while, the price point value seems very good.
I am piecing it together by buying a complete frame and slide separate, I mainly wanted to try a dot on a pistol since nearly everyone seems to like them. I have not warmed up to them much and figured It may pay to shoot one more than a mag or 2 at a time.
This is a cheaper way than modding any of the pistols I already own, basically can get the entire pistol and optic for the same money as just the optic cut slide for an M&P. And yes I could probably send off my slide and have it milled for much less, what's the fun in that? (don't tell my wife). Keeping in mind I have nothing Glock but some mags for a 9mm carbine, I still suppose I can manage to get the slide on the frame.

Anyway, I see all the slides with hole cutouts, what is the purpose of that? Just a looks thing?
Will the dagger fit in a Glock 19 kydex holster? I have read it depends, so if so which ones fit?