I have a Milt Sparks 55BN for my commander size S&W1911. It is the bomb. I have been moving to plastic for a lot of my guns, but the 1911 still gets mostly carried in this holster. Great retention, great draw.
I find it to be very slim OWB carry. OWB is my favorite carry method for both comfort and draw, and this holster carries almost like IWB from the concealment perspective. Milt Sparks has a really long lead time, but this one was worth it to me.