Just got mine today. They sound great, but the cord gets pulled out of the headphones WAYYYY too easily. I have a feeling this is a defect, so I am going to return them and something better just to try out.
Another problem I'm having is that the ear cups are not at all breathable, my ears get hot after only 30mins. The headband also applies a ton of pressure on my head. My Sony V6s with velour pads are a lot more comfortable.
I am thinking of getting the Sony MDR-1Rs right now. If they are not amazing, I'll get the cheaper MDR 10R.
What samandhi said. I thought it popped out too easily too. But I wasn't pushing it in all the way. You have to push hard enough that you think you're jamming it in. Think putting a square peg in to a round hole.