Work well and use it a lot, can't say I notice much of a difference with the noise cancelling function. Though made of plastic they have stood up to constant use. First set developed a fault within the first month or so and would only play through one headphone, contacted Panasonic and they replaced without any fuss, and has stood up to hard work ever since.

I brought these headphones a while ago now and have still held together. They are solid and well made. I used to have expensive Sennheiser headphones and after a while ended up falling apart. Ive tried several brands since which ended up breaking when ear piece would always come off then I'd end up taping 1 end before having to buy a new pair. The sound quality is excellent so much so that I prefer listening to music through headphones over speakers.

These headphones would be best suited for someone who listens to music like DnB, Club, House, Trance, Techno, Electro, Dubstep etc.. but for someone like me who listens to a lot of prog rock and metal they are simply too bassy and can make some tracks sound horrible, the most comfortable pair of on-ear headphones I have used though.
Good sound quality, comfortable
Noise cancelation almost non-existent, too bassy, not good for rock music

I bought this headset prior to my 16 hour flight to Hong Kong and enjoyed it throughout my flight with the flight video system. The fit is quite comfortable. Once in Hong Kong I tried it by listening to music using my iphone. Even though one first wants to adjust the iphone equalizer according to ones taste, the headset then produces good sound quality. All in all, I am quite happy with the purchase thus far.
Good sound for the price
Time will show how well the plastic parts will hold up.