I have one for my G19/23 and one for my 4.25" 1911.
I really like the advantage of being able to slip the holster off when I can't carry in certain locations. The clip holds it in place when it's on, yet it's easy to remove also.
When sitting in the car for a long drive I can nudge the pistol forward or back to make it more comfortable. Once out of the car the clip holds the pistol at a mild butt forward cant.
I'm not a big fan of Kydex, but it works well for me.