I recently won a competition with the prize being a set of BOSE QC20i headphones. A condition of the prize was providing a reader review to Gizmodo - if anyone is keen to find out about these headphones, follow the link below, and if you have any other questions, hopefully I can answer them for you!
http://www.gizmodo.com.au/2014/01/gizmodo-reader-review-bose-quietcomfort-20i-noise-cancelling-headphones/
http://www.gizmodo.com.au/2014/01/gizmodo-reader-review-bose-quietcomfort-20i-noise-cancelling-headphones/