Pros: Got these to replace an ailing set of MDR-NC33/BM bought 2 yrs ago. These work as well and allow me to listen to media and hear every nuance while commuting. I sit in the back of the bus over top of the motor so there is a lot of ambient noise.
Cons: There is no 'monitor' button as on the MDR-NC33/BM. I have to temporarily turn off the unit to hear announcements and such. This can become annoying at times.
Summary: I never expected them to be very good because of the price but these are better than a fair amount of the more expensive ones that I have had. As it says on the box it cancels out low frequency noise but not as much high frequencies such as voices FYI
Summary: Price is right. Sound quality as earbuds is awesome. Noise reduction seems pretty good. Sound quality doesn't seem to be adversly affected by noise cancelling. You can use them as standard earbuds with them turned off or without a battery so for regular use you are not wasting battery. They are reasonably light. The multiple size ear cushions allow them to fit different ears (I have a set as does my wife and she needed a smaller cushion to fit in her ear properly).
Summary: I've been using these for 2 years. It's excellent sound quality and the noise cancelling works great. It removes engine noise from buses, cars, trains, planes, you name it. I actually have an easier time listen to airplane announcements with these headphone on. The sound quality is good. I listen to mostly New Age or Classical music with some pop, rock, and alternative. It does great for all of these genres.
Summary: These are solid sounding headphones, bases are OK, I had other more expensive headphones with much worse base. They also feel comfortable in the ear. Does have a light hiss when there is nothing playing, but beats the sounds of the plane engines. Noise cancelation works well. Cord is longer, which is actually handy when travelling and it does come with a clip to shorten the cord. Really nothing to complain about for [the price]. I'd buy again.
Summary: I bought these on sale for the purpose of using them on flights only. They were fantastic and were able to cancel out the engine noise. I also had no issue with ears getting tired or other problems that people complain about although my flights averaged about 4 hrs in duration. I would definitely buy them again.