Unfortunetly, I ended up purchasing these when they first came for about 50 pounds. I was looking for some headphones that were a bit conveniant for music purposes (with there being a lot of wires as it is!). I am at a slight disadvantage at first because I'm a little guy and they didn't quite fit my head so well, but I'm under average! It was when I actually started using them which bugged me. The headphones have some kind of noise limiter which is used to compress/level out the sound so you get any unwated noise, which would be great if it didn't compress it so much that it sounded like I was ripping a file from Youtube. The problem with it is that it just pushes the volume right down especially if you're listening to louder stuff.
That said, there are ways of dealing with it depending on your uses. If you have a mixing desk it's relatively easy to level things out, but I don't have access to that stuff on a regular basis. They're also very conveniant and I've had no problem using them around the house, I could go outside and get the same reception. It's just a pity about the sound quality.