Im currently running that seat. I have about 13k on it and very happy. I felt it moved me back a little, about an inch. Also maybe up a hair. I love the back rest.
I am 5' 9" and don't want to move forward, nor feel like I am sitting taller. Is taller what you mean by up? I have never had the opportunity to ride with a backrest. I do hear good things about them though.
Up meaning higher not closer