The cups are indeed small. They barely fit around my average sized ears. Bigger than the Momentums though. Depth is better than the 7520, so less ear back touching issue. Comfort of the 1R is better and I think the 7520 is even more comfortable too, by a little bit.
The overall build is kind of plasticky compared to the awesome Magnesium Alloy build of the 7520. It also smells like it's from China, haha. I think it'll go away though.
Overall, though, personally I have no issues with the fit, but would hesitate to say everyone will be like this. The cushions are pretty soft and as they warm up they do form around the ears better.
But man oh man, just in case these fit comfortably you have to check them out because of the sound. It's like WTF kind of reaction because they're so good. LOL. (Wallet Slayed!)