Summary: I've owned these headphones for around 9 months now, and they are excellent for electronic music. You may feel a little weird walking around in them, but they are powered very well by every portable device I've owned (iPod, Samsung YP-Z5, Sony Discman). Sound quality and definition has been improved using a pocket amp including a broader soundstage; this is probably to be expected considering their intention towards home DJ application.
Summary: I've been a Sennheiser fan for a while, having used various in-ear 'phones for my daily commute and using some HD201's for a years at home. So when I decided to upgrade I did some research and plumped for these HD215's. I was slightly disappointed and underwhelmed to be honest. They produce a nicer sound than the HD201's but not by that much.
Summary: In fact, it all depends on what you're looking for. If you want real subtleties in sound, crystal clear mediums and lows, warm and strong bass then you definitely need to spend more money on your headphones. I own quite a few pairs of in-earphones, headphones, and I bought these headphones mainly for gaming and very "casual" music-listening. For these purposes, they're good, no problem. They feel pretty robust, they are comfortable (7/10), and fairly light.
Excerpt: used for 3 years this is my 5 th or 6-headphone I prefer a jack of origin mini jack (to attract the clientele of ipod / phones? - its a very good listening for the monitoring, super insulation but fragile: one side does not work anymore even after change cable.
Summary: Wollte mir endlich mal ordentliche Kopfhörer zulegen und habe mir deswegen Sennheiser geholt. Ich wurde leider Enttäuscht. Das Kabel war etwas kurz und der Tragekomfort sehr schlecht. Die Muschel hat sich sehr unnatürlich angefühlt und war schnell schmierig. Klanglich sicher in Ordnung, aber das ist halt nicht alles.
Excerpt: utilisé depuis 3 ans- c'est mon 5 ou 6 eme casque- je prefererai une prise jack d'origine que le mini jack ( pour s'attirer la clientele des ipod/telephones ? - tres bon son a l'ecoute pour le monitoring , super isolation mais fragile : un coté ne marche plus meme apres changement du cable.