Carried a Glock for over a year on duty. Went from the Raptor level 3 to the ALS and never looked back. If I carried my 1911 on duty it would be the 6360 that it would ride in period.
As it is my 1911 is my off duty EDC. It rides in a 6378 Paddle ALS. Got rid of my Serpa for the 6378 and it is a much better quality and in my opinion a safer design. It is also accepted as an off duty holster, where the Serpa is not.
The ALS system is instinctive, and superb. Very little muscle training needed to become proficient.