VERY STURDY! Adjustable straps were awesome for my short wide feet. First thing was the packaging. I could save memory profiles, and the profiles worked as long as Synapse was working, but the whole idea of the on-board memory is to have it work without Synapse. Received earphonesUnboxedChargedTried and failed. I wont put it past Apple to auto-fail anything that it detects that is not THEIR tips. One tip is from this company. I contacted Yardstash, and within hours of emailing them, I had a someone respond. Easy to install, great action when kicking it up and down, easy for kids to do. Last tip of the hat here: If they can survive a 2 yr old stretching them at unimaginable angles and pouring water on them for God only know reasons and still crank dope beats daily, theyre worth your 150 bones.