I bought these headphones since I have the 681, which are semi-open back and I like them for enjoying music and also mixing. I needed a pair of closed headphones so I chose these for no particular reason except that I liked the shape on the 681, which is the same on this ones.
I use them mainly for tracking voices and acoustic guitars, and for that they work great, very comfortable, extremly light but also with a good clamp that isolates enough for tracking without any problem.
The response is, as xpected on a pair of closed headphones, not very flat, the low end is quite prominent but they don't sound too muddy to my ears and can deliver a pleasant feeling overall.
The cable sistem looks a bit cheap but works very well: there is a short 3.5mm jack on the headphone and you can simply use a female to male cable of the length that you need (in the box there is a 3m long one and a 1m long one).
The pads, once you have changed to the velours ones are very soft.
the only thing I can say is that they look a bit fragile, but for now in this 4 months they worked perfectly.
For the money they are a very good choice in my opinion.