So I do rope burn at the gym and these are perfect for the activity. The bluetooth allows me to skip to my heart's content without having cables tangled with my rope. I usually leave my iPod on the floor somewhere near by.
Sound quality wise, it is ok. The bass can be a tad stronger I find. Noise cancellation, it is ok, but maybe the gym I go to tend to blast music, so it does not really block out sounds from the environment.
What makes these headphones spectacular is the bluetooth. The range is pretty good in fact. I left my iPod in at the gym locker once, and it wasn't until I was about half way down the stairs that I realised I left my iPod upstairs. the distance was more than 30 feet I would say.
So, this is a pretty decent bluetooth headphones for what it does. Wireless. It is not design for an audiophile. Buy Over-ear Headphone Wireless Bluetooth for Ipod Black Color!