Only ?problem? is now you have to remember to bring a wrench when you want to change hitches. the instructions provided are for a DIFFERENT DESIGN . Seems to be working/adhering well so far. The charging case allows you to recharge the earbuds three times before needing to recharge the case. These fill a valuable gap in my life for when I want to be listening to music or a podcast but still be safely connected to the outside world as well. The supplied disk though installed well and if I had a need to set the dpi and such I feel sure I would understand how to do it. Are just what he wanted. They also GLUED the tag down. Nice spring and summer shoe, not meant for lots of walking but will do better then other heals! A lil uncomfortable over time