Sound in the headphones is good. Fit is very adjustable. Volume control on headphones is nice and the design works for fine tuning.

Microphone has very spotty and delayed pickup.

Good for use as headphones but if you are looking for a gaming headset or to talk to people online I would look for something better.

Sound Quality Mic Quality Comfort Fit Adjustable Overall Build Quality

Overall a top quality headset, which is what you'd expect from a Sennheiser product. The sound quality is outstanding, the mic is crisp and clear, the fit is very adjustable, the headset is comfortable to wear, and the build quality is clearly high end and solid. The mic boom auto-mutes with a distinct click when you raise it away from your mouth. The volume adjustment knob on the other ear has a quality feel and comfortable resistance when moving it. While the price could be considered a weakness, I wouldn't hesitate to recommend this headset if it falls in your budget. You certainly get what you pay for with this headset. If you can snag these on sale, even better.