Overall: Best sounding headphones that you can currently get on amazon for $39.99 if you don't care for isolation. 
 
Build: I wouldn't say it's very durable looking and it is mostly made up of plastic. C rating
 
Comfort: The cups are large enough to cover my ears and the pleather earpads feel very soft and comfortable. A

Isolation: Isolation is very poor for a closed headphone. D
 
Sound: These sound pretty amazing for what they are worth. These sound very clear. A+
 
Value: I have no idea how durable these are and don't plan on breaking these to find out. If you don't care for isolation, A++, if you do, I would suggest looking somewhere else.

OVERALL: I would say this is a fairly decent headphone but not for its price. Gets a C rating. If you don't care for isolation the Creative Aurvana Live offers better sound for 1/3 of the current price.

DESIGN: I was fairly impressed with the design of the Solo2. It is foldable with a detachable cable and even comes with a small case (Sometimes I find it hard to fit the headphones into the case though). It looks very sleek and simple. My only problem is that the inline controls don't work even though it clearly says it works with android devices. I give it an A here.

ISOLATION: The Solo2 does isolate but its not impressive or anything. C rating.

SOUND: I feel like the Solo2 needs more clarity for its price the isolation and over-ears design does give an intimate feel to the music you are listening to. B- rating

COMFORT: I am not picky with comfort so I usually get along with things fine. Keep in mind, this is an on-ear headphones so the earpads go directly on your ears, not over or around. I think this does well for comfort. B
 
VALUE: I received it as a gift, but it was over $200 at the time. You would find more clarity in the Creative Aurvana Live (CALs) which I got at amazon for $45. D