Only issue I had was that while these are advertised as "prime shipping"; it took 4 days to arrive after I received shipping notice. This seems to be a Sketcher thing though since all their shoes seem about a half to a full size too large. Sound :The sound signature is (Harman target) neutral. 2 as well as the slightly indented knobs on my older stand. Unfortunately, these shoes are hard as a rock. I did not open the cards with the exercises on them because I had a feeling right away I would probably be returning it. It?s a decent case, just not the quality I expected for the higher price. This looks is real life like a top quality item, and is quite functional. That should be an easy fix for the manufacturer. This product is great going to buy a second pair.