I use this strap with my Lull 5 string bass. It's a monster bass that needs a monster strap, and this strap fits the bill. I can play standing for hours with no fatigue. The four inch width distributes the weight across my shoulder and the softness of the leather ensures it is very comfortable. Really makes a difference.
I use Jim Dunlop Straploks and they were easy to install on this strap.