Pimp My Band is very cool. But, maybe this is a coincidence and unrelated, when I tried to use my Starbucks app after installing Pimp My Band, the bar code for my Starbucks card no longer appears, just a black screen. I removed the Starbucks app from my Band and then restored it, but it still didn't work. I did a factory reset of the Band and the bar code reappeared.
UPDATE: After the factory reset and hearing from that my experience may have been unique, I installed Pimp My Band again and installed a favorite lock screen. This time there was no problem with the Starbucks app. Everything has worked as expected for more than 24 hours. Still not sure what caused the Starbucks app to malfunction, but it was clearly not the fault of Pimp My Band.