Extension - Loads of bass extension... but, Impact - Slightly lacks impact and, Quality - Very loose. Does improve with an amp though. Mids - Good Highs - Good Soundstage - Rather good considering they are supraaural and closed Detail - Not bad

Portability, Isolation and Durability is where these headphones shine. Small enough to fit insude a handbag or laptop bag makes this also idea for travel and people on the go. Indestructable qualities and about 15dB of attenuation makes this IMHO the only choice for the DJ. (I am one)

I find the dual headband extremely comfortable. Can listen to hours without discomfort on the ears.

These are the best headphones for portable use that I have found. The detail is not as good as other headphones in it’s price range but the overall package of size, sound quality and durability make them the ultimate portable headphones. They have great bass impact, a nice punchy sound and isolate better than most headphones They do exhibit some sibilance at times. They make excellent DJing headphones.

I use my Sennheiser HD-25s for commuting. They are bigger than buds and canalphones, but smaller than the usual cans one would use at home or in the office. They are durable for sure, and have a split headband allowing one to adjust to one's head -- and they stay on your head quite well. You can rock with these phones. The HD-25s are a little uncomfy with a high clamping supra-aural factor, but with velour pads and some time, the discomfort is not a great. I enjoy these phones with my rock music quite a bit; they have punch for sure. Detail is good, but not as good as my Grado 225s or ATH-A900s (nor should it be). Bass is good, highs are okay, mids are strong, soundstage is non-existent, separation is good, but there is sibilance. The HD-25s can be considered a little over-priced for their sound quality (average detail at best for their price point), but the overall price to me, includes the package deal of a portable headphone that sounds pretty good, and is very durable. Isolation is quite good. A good compromise for those needing a portable, closed can who do not want to use canalphones.