I only received them yesterday but they are amazing if there is any change in quality I will come back and update. I bought them to extend an appallingly short Apple Watch charger without the fifty dollar price Apple charges for a 2 meter cable. I chose this cable extension because of the fast charging over the original charger with a longer cable. This USB extension cable didn't interfere with fast charging at all. Last night I put my Series 6 watch on the charger at about 30% with this new extension cord so it actually reached my high bedside table and was fully charged in an hour.