Looking in detail, I saw advantages plus. QR axles attach directly to the post, which is designed like a fork dropout. Installation was easy with a drill and a torpedo level; two screws and its up. I ordered size 39, received 38, too small. I am using this for doing editing work. The problem is that the right click is no longer responsive. Super cute case and pretty durable. Extra: friendly set up for me. These bands are thick and durable, they are actually similar to the resistance bands I used as a college athlete in our weight room. My daughter has abnormal feet & wide Birkenstocks were the only shoe she could wear.