Summary: I use these for work and they are solid headphones. They do not block out sound. The highs are crisps but the bass is lacking a bit. I'm a basshead so I wish there were a little more there. The IEMs are heavy in a good way. They feel like they could survive a war. Overall I like them, hopefully with a little burn in they'll kick a little harder.
Summary: I use these mostly because I travel and I wanted some better quality sound than my JVC have. They are a much better headphone, but they allow a lot of ambient noise through. They also really bring out the failings of formats like mobile Pandora or low bitrate mp3s.