Summary: Wow, far better than I'd hoped for. I've always been an over the ear headphone person. Turning these on truly Surprised me. Especially on the plane for 9 hours. My wife is seldom excited about ear buds was very impressed and started not to return them.
Pros: Quality build and feel, comfortable, great sound and excellent noise cancelling.
Excerpt: I use these every day on my train commute. The BART is very loud and screechy and these headphones protect my ears and allow me to focus on my audio books.
It's a hassle to have one more battery to keep an eye on, but the benefits are well worth it.
Summary: I bought these fancy stuff 2 days ago,it is absolutely amazing,I'm telling you guys I used expensive earphones before but there is no quality to discuss of any earphone or headphone when in a noisy situation,you don't even understand what you listen,lets discuss about qc20 or qc25,there is no noise...
Summary: I've owned numerous Bose products over the past 20 years, including over-ear noise cancelling headphones. These QC20i's are my absolute favorite. The noise cancellation is amazing, reducing even chainsaw and lawn tractor noise to faded background noise and completely eliminating most other noise.
Excerpt: The Bose QuietComfort 20 headphones truly deliver the sound quality that they profess to in their literature. From the moment I placed the earbuds and turned on the noise-cancelling system, it was a unique experience.
Summary: The headphones sound great and the noise-cancelling factor is really awesome but the durability of the headphones is very poor. The buttons randomly stopped working so I couldn't use the headphones with my IPhone any longer. Then a week ago one of the ear buds decided to stop working on me.
Summary: I commute to work everyday on public transportation. The noise level can get irritatingly loud. I purchased these for the air cancelling feature and have fallen in love with them. I am now able to listen to my music and block out the world around me.