Summary: I bought these to use with my iPhone and they work perfectly. The tone is nice with warm bass and accurate treble. They are not super loud but that is probably a good thing. Due to the iPhone/iPod/Mac plug on them you would need to get a 3.5MM PLUG TO DUAL MIC/AUDIO 3.5MM adapter to use them on a PC or normal stereo but they are available cheaply from ebay etc.
Summary: After 6 hours of solid research, I was unsure about this purchase, but had heard about the Denon brand and decided to give them a shot. After watching youtube reviews and looking on other expert sites I wasn't expecting much - in fact placing orders on Sennheisser HD 205's as well as PX100-II's . However, after receiving these I was really pleasantly surprised with the sound quality.
Summary: The headphones fit nicely over your ears. The sound quality is excellent and beats many dearer headphones. The added bonus is being able to make or receive a call without removing the headset.