My 3rd grade daughter has only worn these for three days and big chunks of the rubber outsole on both shoes came off. There is a slight heel, just enough to keep me going forward. Ive not gotten a single complaint about background noise. I changed to a new battery and tried a different set of phones to see if the connection was at fault. This case actually fixes that. Tuve este modelo cuando era un chaval de 12 años y era la sensación de mi clase . Perhaps if this product came with a treat dispenser for each time he actually hung something up to reinforce good behavior. Most important, they need to use better quality materials. My granddaughter put them on and wouldn?t remove them! This was a gift for my wife that recently started to run every day and needed something sporty to wear.