It has great resistance for squats and deadlifts. I think the incoming voice quality sounded a little better to me on the PXC 550, but honestly both were great for voice calls. I cant imagine wanting to walk in these for long. This is just the right size to have in the back and not get in the way while I do my pull-ups. Comfortable and the arch support is very helpful. I have 3 left in the box gathering dust. To be honest, I feel terrible that I had bought so many headphones and returned them all. Two separate pieces. Great material well worth the price. 25? wide (such as larger cans or bulk spices).