Bought these bad boys yesterday. Built amazingly, and very sturdy. The aluminum and soft padding feel great. Not super light, but not too heavy either. Good sound but when on, it gives a static sound. Like white noise. Kind of frustrating if you're listening to a softer song. And you can't use the headphones, AT ALL, if you don't have batteries and they're not turned on. The noise canceling is amazing though.
I originally purchased the studios, but did not like how much they leaked music. So I ended up exchanging them and purchasing the executives. Although they still leak, it is not nearly as bad as the studios. On the other hand these are great headphones & the noise cancellation is awesome. The bass does not kick as hard as the studios, but i kind of like that. They feel great on my head & fit around my ears nicely. Honestly I like my Bose in ear headphones a little bit better, but these are a close second.