With some proper alignment and fiddling I get it to nearly perfect. buyer beware id say customer service is trash but it seems to be inexistent. While switching between the two devices took about 1-1. I am very happy with this. When not in use, I took care to store these properly so that they would not become tangled and to increase longevity. Ob der Schuh zum Laufen geeignet ist, kann ich nicht sagen. I am normally a size 6 so I ordered 6 and 1/2 ,but it fit like a 5 and1/2. The product was easy to handle and install. I sent them back for that reason. They are the same shoe, as the bottom of the shoe carries the White Mountain logo, just sold under Rialto.