Sound quality is pretty good. Build quality is very good and I found the magnetic backs very useful with keeping headphones and cable tidy in the pocket. The big issue is that these things just do not stay in your ears. Considering their cost this is a major design flaw, I would expect more from Sennheiser.
 

Good quality of sound but nothing special. Ear pieces are heavy and bulky and I personally found it almost impossible to keep them in my ears without falling out. This is just while cycling or in the gym, you can forget about trying to run with them all together. The build quality appears to be good, volume control functions well and the extension lead comes in useful however they are desperately let down by the terrible fit. I expected far more from them considering the price.
 

These uniquely styled headphones are instantly eye-catching in a luminous green. A pro or con ? I'll leave that for you to decide. I will however testify to the quality of these headphones. Think of them as the headphone equivalent of a Lamborghini. Brightly coloured, powerful, with some insane additions that make them unique. The headphones have an inline volume control - similar to many that come in standard in headphones nowadays however this inline volume control is magnetic. Why ? No one knows, but I love it, utterly pointless in every way other than to keep you wondering what the creator was thinking when adding it, and what it would be like to meet such an excentric person. Onto slightly more important matters. You may ask about the sound quality, to this I answer superb, enough to be able tell the difference between mp3 and a higher quality audio CD. Comfort ? As a particularly picky customer when it comes to comfort I have no complaints about these headphones, they fit in the ear comfortably and securely despite energetic movement such as running. Looks and Design ? Bright Green and White with magnets, need I say more ? Durability? Here is where the problem is for me I have noticed a small tear in the wire on my pair, however to be fair my headphones do go through a lot of turmoil and these headphones have already lasted x10 longer than my previous Phillips pair. Value for Money ? Beyond a doubt, the best headphones you can get for the price.