The mount is great but most of the sellers do not offer the backrest. Up front this isn't obvious but once you start to look into it you find the backrest is one of the most expensive ones available. When you factor in the total cost of buying this mount I suggest that you look into tons of other brands that are much cheaper.
Update: picked out and received the matching backrest from Drag Specialties, I have to admit that the quality of all the parts, Mount and rest are first rate. Top quality. You get what you pay for really does apply here.
I had a original HD bracket which uses the backrest with the two bars you have to squeeze and then fumble getting it where it needs to be, but with this I just slide in the backrest with its single bar, push down and done!
Love it.