These are open style headphones so if you don't want others to hear what you are listening to buy closed type.
Other reviewers complaining about leaking sound didn't do their homework!
The sound quality is excellent balanced for all types of music but if you are looking for heavy heavy base then look elsewhere.
The bottom line is that if you are looking for all day comfort and high quality balanced sound then these HD555 's offer exactly that. You know they are quality when you find that you can drop the volume levels way down and still have the most fantastic all round balanced involving sound. So much so that even if you are in an office others won't hear.
In terms of comfort though they are not lightweight you can wear them for hours even if like me you wear glasses the soft ear pads are very comfortable.
The downside is they are just so amazing that once you've experienced this kind quality everything else just sounds so wrong.