The cord length is also great, much better than some other chargers! In slipper mode they do stay on. which lead to my obsession with decorating them. The feature that made me choose it over the others was, it uses a single cord for all three devices. Build quality is strong enough to withstand a 4 year old?s abusive use. Very soft cushioned inner sole with strong flexible outer sole. I dont need to clench my toes when Im walking, they dont fly off my feet, and with the bottle openers on the soles, Im the hit of the party, getting laid left and right. I eventually took my shoes to a cobbler and had the insole area filled in. I usually can only find foot comfort wearing my Asic tennis shoes with my orthotics because I used to have heel spurs and BAD Plantar fasciitis in both feet! If you have to put the peg in on both sides, be real careful flipping it over because the first one can still fall out.