quality just OK for the price. So, after the sound test, I call the wife. If was my fault I ordered the wrong ear clips. I had hoped that the Mocs would mold to my foot over time but after wearing them for 11 days the only difference that I see and feel is that they are looser on my feet. The magnets are super strong and the unit will carry a lot of weight without slippage. An no, its not side play in the loosely-attached scroll wheel, that produces its own rattle. Thanks Volatile. I have used the red, black and purple band so far. They do provide some adhesion strips to use if you have the same problem I have but they?re not working for me. I bought this item because it was highly rated.