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Pro Good audio quality for bone conducting headphones
The Bluez 2S headphones have clear mids and highs with somewhat lacking lows. The audio quality is comparable to "regular" earbuds in the $70 range.
Pro Good battery life
While the headphones advertise a 6-hour battery life, they can easily surpass that threshold if you don't listen to them at full volume.
Pro Reasonable quality microphone
Con Low end is a bit thin
These headphones can't produce the thickness of low end that "regular" headphones can. The low end is till there, it's just not as pronounced.
Con The band could be more comfortable
The band is somewhat rigid making it difficult to wear it comfortably for extended periods of time.
Con Minor audio leaking
In a completely silent room it's possible to hear the output of the headphones, but that possibility goes away as soon as there's any ambience.