Im having increasingly frequent difficulties turning the earbuds on and off. So far its excellent. You can not turn off the noise canceling when blue tooth is on, i have emailed customer support and there is no way, these headphones could use more base, it has almost one to the point all my music sounds odd. I really do have a bone spur and I can remember which foot it is on unlike another septuagenarian we all know. For me it?s the perfect size. The actual sole is perfect (both wider and longer than the Medium that I had)! The only annoying part was tightening the bottom screw after reattaching the ring to the back plate. It is a little tricky trying to find out which size is right for you, I would suggest going to the Birkenstock website and looking at their official size chart if youre having questions. old daughters first trip to Hawaii. It was relatively easy to install (but Id recommend cutting off the excess material used to wrap around the frame.