Having taught the M4 carbine for over 20 years as a LE firearms instructor, I would say overall this is a very good drill, for all the reasons the author mentions. It is hardly unique, though, having used one variation or another over my entire 30+ year career as an instructor, as a training...
One of the best articles on the subject in a long time. After a 34 years career in law enforcement as a firearms and defensive tactics instructor, I agree this is very sound and practical advice for the citizen concerned with self-defense.
Red dots, lights, lasers and multiple large-capacity...
The square cutout in the frame for the trigger often has sharp edges and is a hot spot. A sharp knife can take the edge off of that and eliminate the bite there.
I have a Hellcat and really like it. Had the SIG 365XL prior and while I preferred the longer slide and grip, the grip was too narrow and the sights were not designed well.
I would buy the Pro if it was offered without the RDS feature. The slide serrations are weak and slippery on the RDS...