I've had these headphones for a good while now, and they've been fantastic!
Key features include;
Amazing sound quality
The sound doesn't escape into the open world
Can go up to VERY LOUD volume
The sound never seemed to fade through use, their max volume is VERY loud and don't ignore the warning because you very well could hurt your ears.
Main let downs;
They feel very plastic
Can become very uncomfortable after a short amount of use
The feel quite hard which adds to the point of them not being very comfortable.
Easily broken due to the poor build.
I never thought these would break due to internal problems. I had them for about 4+ months without any issues at all. Then it happened... The wire developed a fault, and there was nothing I could do to fix it. So yes, now I have to buy new headphones as now they're almost totally impossible to use.
I don't know if the price is worth the 4 months of use I got out of these but nothing I can do but warn other about the problems I encountered.
I recommend taking on board the common problems people have been getting with these and find a more reliable pair of headphones which have a much better build and are more comfortable.