Its a refreshing change of pace every time I get to play as either Peter or Mary Jane. For the safety hook positions I use hole #11 for bench, hole #17 for squat and hole#17 for overhead press. Its fine that it doesnt have a battery case like on Apples Airpods. Danke! If you want to use this outside, its waterproof. Im going to try charging one more time, but if it doesnt work, Ill be returning it. If you just use them for shorter duration events, such as phone calls, youd probably be fine. Worked beautifully for 5 month and now headphones are disconnecting every 3 minutes, producing beeps before disconnection. It is solid enough for my use. I 2 ordered and they come already assembled and its super easy to stack.