Summary: I love these headphones, and for 80$ on Amazon I don't see why someone wouldn't want these. They are great sounding, and the folding design is great. They fit very tight, so it can become a bit uncomfortable at times. But the great design (and look) of these definatly make up for this!
Summary: K518 is no doubt a legend - killer sound and decent isolation for a portable cans, together with the most badass clamping force ever.
K67 is one full class above in sound, and maybe two in comfort.
Pros: VERY deep bass, much improved comfort over K518, clear sparkly but not harsh highs, lush and moderately detailed mids with good definition
Cons: Still a bit uncomfortable for the long haul, Soundstage compressed at times
Summary: Have had these headphones now for 6months. Don't know much about the technology behind them but i love the way they sound, nice and punchy but very clean at the same time. They hug your head nicely which somewhat isolates you from other noise.
Summary: I got these headphones yesterday and used them today. I must say it has the right level of bass with the rest of the sound. It definitely has everything I was looking for in a pair of headphones. I'd recommend them to anyone
Summary: Well balanced, maybe a tiny bit bass heavy but they are mainly DJing headphones but overall sonically very good mixing headphones and very comfortable. Bought these after a friend had them and my old ones got broken. Durable construction as well, like that you can fold them flat.