These are very comfortable headphones. The sound quality is fantastic, and the impedance is low enough to be driven by a smartphone if you so desire. The only major drawback is one I should've expected but the open back design of these headphones lets in a LOT of outside noise. While this enables for a great soundstage, it's only good if there is no sound in the room. Turning up the volume may drown out some of it but you could easily disturb anyone in the same room. If you are planning on traveling with these headphones around other people, look somewhere else. These headphones are best for private listening sessions.