I'm new to carrying a 1911 (SA 1911-A1 Mil-Spec 5" SS (yes I'm proud of it
)), to me carrying it is con-1 is no different than carrying my XD with one in the pipe as they both are cocked and locked. It is just that the 1911 has a visible hammer and manual safety instead of the 'trigger safety', so far I have never had any problem with the hammer snagging while drawing(or any other time).
The only thing I have to watch on my 1911 is the manual safety, I have found it in the off position twice (in past month), the only thing I can figure is the thumb-break on my holster (Bianchi Black Widow) sometimes catches the safety while re-holstering, at first this concerned me, but I still have the grip safety, which I do not depress while re-holstering,and when I am handling the gun, I never have the booger picker on the bang switch until I am ready to fire.
I now check the safety after re-holstering, but have yet to find it in the off position since, maybe the Bianchi just needed to be broken in...I dunno.
In regards to the product listed in the OP, to me it is fixing something that isn't broken, but that is just my opinion.