First of all id like to say that they are totally worth the money you pay for them, I mean you will not get a better headset for this price.
Build Quality: 10/10 - What can I say other than the build quality is excellent, Everything that this headset is made from is great quality, and I mean everything, Great wires, connections, materials, everything. This headset will last.
Sound Quality: 7/10 - This is one of the minor problems, The sound quality is good but not great, it sounds a bit dampened / muffled so you dont hear everything in full clarity, also the bass is a little weak for a 40mm driver. I expected more, You can hear everything around you, including the voice chat of your team-mates It just feels a little lacking in parts, BUT you have to remember the price of the headset, and for what I payed the sound quality you get is well worth it.
Comfort: 6/10 - This is the main problem I have with the headphones, when you look at the headphones you would imagine they would be very comfortable, but I found myself moving and adjusting the headphones around for a long time before I actualy got them to sit comfortably, The problem they have is that the ear cups are so big that your ear just ends up touching the plastic rather than the cushion, which causes discomfort, and if your wondering, I have rather small ears, so I imagine this problem would be even worse for somebody with larger ears.
I gave this product a 4 star but It would of been a 3 star if it wasnt for the amazing build quality.
I still recommend this headset for somebody wanting a cheap but good headset. but if you are wanting a more comfortable headset then id be thinking about paying a bit more for a "better" headset