I can keep everything together and not have to worry about losing the detail brush, or any of the interchangeable heads. i bought a size up and they are just slightly big, but Id rather have them like that as I hate it if my foot is overlapping even slightly. My ears were dry after sweating up a storm walking all day at six flags. El sonido es increible para ser in-ear! Id give it 5 stars if it came with this! Cons: Slightly baggy, premium price. Ordered as a replacement of my old ones was very disappointed! The shoes look nice and are very breathable in warmer weather. We added some bungie cords over the wheels and it stayed in place for the two hundred mile drive to our destination. The top piece would never stay on.