A product I've used off and on for years, I finally decided to replace my old cans with these. I purchased them specifically for the tight grip and isolation, as I'm primarily a live sound engineer these days, and wanted something with higher fidelity than what's typically found laying around at clubs, or thrown into a work case.
I'm extraordinarily happy with the product's sound and build quality... I don't have to be afraid of them getting knocked around on the gig. The ability to detach the cable (from the headset), or screw it on permanently is nice, as well as the screw off 1/4'-1/8 adapter. It's also nice to have the lower impedance, as I often found myself needing to crank the monitor pot way too high on my old cans... from a low budget to high end board, they seem to always have headroom to spare.
My only real con with this product is the curly cable, it always seems to get caught up on stuff.