I have been eyeing Galco's M6X auto-locking and the M4X Matrix auto-locking. Instead of using the trigger finger, you use the thumb, which is already going to be in that location in a proper draw anyways(proper draw more or less is you drawing and not someone trying to take your gun). Not sure what the difference is between the two holsters except overall appearance.
I have heard the arguments about fine motor skills in a high stress situation but its not like that release is something you couldn't do while drawing whether you were wearing mittens or not; I use mittens as an example cause I have also have heard allot of people say it is like wearing mittens when you lose fine motor skills as a comparison.
But everyone does have their own opinion and preferences, and that is why there are so many options available for the end user. Just have to find what works best for you and what you are most comfortable with I suppose.
I really enjoy seeing what people have been saying and it is all good feedback and input. Some of us just need a place to start since there are so many choices out there in a wide variety of prices.
Lets keep it going...