The back strap is too long, the shoe just slips up and down on my feet. Good music to all! The heart rate was very inaccurate. I wear them in the bottom hole and my diamonds (cz) in the top hole. If youre monitoring your stream with a lag, say like what Twitch does, you can get horrible "ring-around" where you hear your own voice a few seconds after you say it, coming out of the Twitch dashboard, which then gets echoed a few seconds later. The cushion inside makes it feel like your walking on clouds. I only wish I could find something to protect the cushions on the head strap. I threw the whole thing over the pull up bar on the rack and he spend an hour being a gymnast on them. These are AMAZING the sound of so rich, I had another pair of Haylou different model that were good but seriously these are so much better! Lasted three months and left me without phone service.