Welp I am on my 2nd defective black sports band. The first one didn't sit properly in the locking mechanism. Took it to the Apple Store and they swapped it out. Now after having the new one for a few days, it has begun peeling on the top of the band (aka not anywhere where it touches my skin). Thankfully AppleCare is doing an express replacement for me so I should have the replacement early next week. I also have a green sports band and it is flawless. I guess the Black Sports Bands are really the problem children huh? Here's hoping that my 3rd band will not have any issues.