Great cheaper version of the split headband variety. I have a few pairs of these and they have lasted very well. Slightly veiled sound, which works out perfect for DJing in clubs with large volume - bright cans at high volume for a few hours are painful on the ears and give me a headache, these with their slightly recessed highs are perfect for longer high volume sessions. 
 
The headband could benefit some padding - i used the padding from a crappy pair of old brandless headphones i found on a pair of these and it makes a big difference to the comfort. (See pic 2 below)
 
The cable jacks are detachable from the headphone cups and over the years (maybe 8-10) these sockets get loose. If i'm moving around with these, one ear or the other occasionally cuts off and requires the cable to be pushed in 1mm or so. Annoying, but they've had a hard life & nothing else has failed. 
 

After reading reviews here and learning about the Denon drivers, i went for a pair of these for the office. They are surprisingly comfortable to wear, the soft pleather pads perfectly covering the ears, with the only discomfort issue being that your ears warm up a bit after a while. Great sound isolation from outside. Short cord length makes them portable - I quite often wash the car wearing these cans, and the short cord means no snagging etc.
 
The headband plastic looks a little fragile, i'm not sure these could live in and out of a bag, also the cable is a little thin and the jack surround is poorly glued in place (although that flaw allows me to plug it into my iphone4 bumper case!).
 
Bass is full and defined, mids are smooth, highs are there, but perhaps that high end sparkle could be better, they sound kinda warm - they say a recable can improve the highs though.
 
I got these at a reduced rate on Amazon and am very happy with them. Great sounding cans for the money. Here's a couple pics i took:
 

Bought these from an apple reseller store so probably paid over the odds. Sound really clear at the top end, little bit lacking in bass punch, although this is improved with better fitting buds. I find a medium Sennheiser but/tip a perfect fit, but with these, the medium bud is a little small and falls out easily, and the large is just too big. I went for the highly rated Comply Foam tips which were £15 for 3 pairs and are superb. They discolour with ear wax though . But the noise cancelling is great, really good in flight. They are basically an ear plug with a thin plastic tube thru the middle which fits snugly over the apple in-ear 'trumpet'.
 
Easily the best sounding in-ears i've heard, and better sounding and looking than my Sennheiser MM50 and CX150s. Better seperation and more clarity. 
 

Bought these based on the good reviews. Tried and tried but they were just so uncomfortable i sold them. Way too much pressure on the ears, plus the headband never sat well either. Most uncomfortable cans i've ever tried on. Shame, as they sounded pretty good.
 
 

Bought purely out of curiosity after reading so many Head-Fi-ers say great things about them.
Simply amazed at the sound quality to price ratio. I love these headphones! I can wear them for hours. In fact i forget they are there after a while. 
 

I've had these cans for over 10 years and they have been great. Super comfy to wear - I can wear them for 2-3 hours at a time. Rather bulky if you have to cart them around. The sound is typical Sennheiser, clean, crisp and fairly neutral. Lacking in bass possibly. Lovely delicate highs. Being open backed, they leak sound like crazy and used to annoy my colleagues in the office