The headphones are great but it took me some experimentation to get the best possible results. Getting the best fit using the supplied earbuds is imperative. Initially I thought the sound was a little thin but I eventually got there with supplied buds. Further, a simple foam bud stretched over the supplied SONY bud produced an even better result as per picture. It might just be my ears! My previous headphones were the Bose QC20 bud type. I was quite happy with these until they failed prematurely just out of warranty but overall the SONY are a big improvement. Sound quality of SONY is very good although I used the eq to tone down the top end sounds somewhat. The noise cancelling on the SONY does not seem quite as good as the BOSE but I am yet to use these on a plane. Walking around the streets I can still hear all the traffic noise and they're not much good for cycling. Wind noise is an issue. But really, they are category killers in terms of what they set out to do. Quality, connectivity, ease of use, battery life and sheer musicality all mean very much to me so I'm sure I'll be using these for a long time.