The excellent product, with amazing built in quality. Based on my experience I will suggest this phone whom is looking more for the music quality then for noice reduction as music is superb but cancelation is not as great as in BOSE QuietComfort 3.

Crutchfield has collected 30 user reviews for this product with an average rating of 4.6 out of 5 stars. The most recent reviewer said, "I bought these after a long struggle to choose between the Sennheisers and the Bose Quiet Comforts. I chose these based on reviews of comfort and overall sound.

The PXC450's give very open transparent mids and highs, with deep detailed bass. Smooth sounding. These are the best sounding noise cancelling headphones I've heard. The Bose Quiet Comfort Series sounds very muffled in mids and highs in contrast with the Sennheiser PXC450's and pale in comparison.

I have this one from last 2 year's. Not using that much because it is big. It's give balance sound bass and tribble.

Clear sound balance sound

Bass is not that much

These are the first jumbo sized headphones that I have ever bought. Previously I have had to replace the in-ear headphones every 4 months. This is because I tend to listen to my music at a fairly high level, and after a short time, they begin to produce a hissing sound when the base is high.

Superb sound quality

My get you a few looks on the train

I bought these through minidisc last year to help cancel out jet noise, as I was going to North Asia and Europe.

Very comfortable, and the noise cancellation is superb. No distortion even at very high volume. Worth every cent.

Sennheiser PXC 450 These headphones were reviewed in a roundup of noise-canceling headphones. --Dan Frakes View full product specs » $450 Sennheiser PXC 450 » Subscribe to the Best of Macworld Newsletter - Macworld is your best source for all things Apple.

I went back & forth between the Sennheiser and the Bose headphones. So far I am very pleased with these for overall comfort and sound quality. I have not used them in an airplane as of yet.

Sound Quality

Comfort; Not as comfortable as Boes

I have used many NC headphones before (Bose QC, AKG, AT), but these are the most comfortable, best sounding ones yet. A bit big, but it works perfect for my ears.