Very comfortable, simple , elegant. My husband absolutely loves this flip flop, first pair worn out, lasted a long time . Most people seem to worry about if it sounds shrill or the bass is ?missing?. I prefer the accompanying music app to the resident iphone music app. They changed the ingredients when they changed the bottle color. This little speaker takes it to the next level! The issue with this is I cannot use any of the display features that come with Strava and my phone is essentially just a recorder. It does not apply to any Sennheiser product bought from a "non-authorized dealer. Definitely bigger than the stand I had been using, so thats a plus. I wear size US11, width slightly wider then medium foot, but not wide enough to wear wide sizes.