Pros: Great sound
Cons: inline controls are dead to Android
This will be a very brief review because unless I discover otherwise, I will be returning these headphones to Amazon because the inline controls for smartphones do not work for Android phones; or at least my Motorola Droid 3. For $350, this shouldn't be an issue. The Sennheiser website has no info on phone compatibility but I purchased on faith given the company's rep (plus I've owned three sets of Sennheisers previously and have always been happy).
I'm simply shocked that a set of cans designed expressly for mobile music players won't work with the stock music player for the most widely used OS out there.
Beyond that, the pads are very tiny, they barely fit over my ears; that's a minor complaint as it would have been entirely livable if it weren't for the dead inline controls.
Secondly, there is a good workaround for this. If you download an app called "Jay's Headset Control" (which is actually designed for the Jay's One Plus headphones) you can get the button in the middle to perform basically any task you want it to. The default behaviour is that a single press pauses, two presses skips to the next track, pressing and holding increases volume etc. It's as elegant a solution as you're going to get with only one button available, however if you're really set on having a remote you'll find it works quite well and becomes fairly natural to use after a while.
I hope this comment was helpful, if not for the reviewer, then for any other Android users out there.