I've got these, bluetooth on them works great, and the bone conduction is really interesting. It's really nice being able to hear your surroundings while having some kind of audio playing. Or if you don't want the surrounding sound, they come ear plugs. Really comfortable to have on too, I barely even notice them (if at all) when I'm wearing them.

Should be mentioned though, for the price the music quality is worse than what you'd get with other devices. It reminds me of a higher quality phone speaker. Definitely not bad compared to some headphones I've used, but it's not amazing. Hasn't been an issue for me though, I happily use them when working. Voice audio sounds perfectly fine. IMO you get them for the other benefits, not because they're the best sounding thing on the market.