Overpriced and disappointing audio
If you are after a sleek looking and light weight headset, these are great. Comfort is subjective, the felt material covering the pads is soft, but the density of the pads may be too stiff for others.
Reading the product description and the price point, I was expecting superb audio and mic quality, to coincide with the Sennheiser name brand. Overall I would put these headphones inline with others around the $40-$60 US price point.
Audio leaking for me was an issue. Ambient noise, like my gaming PC fans, and people talking, are very noticeable, almost like you are not wearing headphones. Those around me said they could hear everything I was playing clearly.
Audio playback quality was poor. The bass in general was very flat, sounding like a speaker being played from within a cardboard box. While the ranges were good, I had to use an EQ to increase the bass and set the crossover frequency to 65Hz to reduce the issue.
I constantly had to adjust the master volume based on what I was doing, 8 for games, 18 for videos and 10-12 for music, with the player volumes of each set to max.
There is no tactile feedback for the volume wheel, other than min/max stop points, making it difficult to adjust the volume to a specific setting from the headphones.
Mic audio quality tended to have phasing issues, causing it to periodically sound robotic.
Noise cancellation for the mic is virtually non-existent, picking up the air conditioner fan and running water from inside a carpeted office. You'll want third-party audio drivers that support digital noise reduction, to remove the hissing sounds from the background that a windscreen or pop filter won't.
Would not recommend to a friend.