I like these headphones. They do not have a mic. The sound quality is ok but they need equalizers to balance the tones and volume per ear as some frequencies are dampened by bone and other tissues. Also, some of the sounds is conducted by air the same as over the ear headphones or earbuds. I do prefer these to over the ear headphones or earbuds, I like being able to hear what is going on around me while listening to music.
I love these headphones. The headphones allow you to hear the world around you AND your music. I used them on a recent Ragnar Relay and felt very safe. I could hear the cars and other runners while still hearing the music I wanted to hear. It is a safety issue and I felt much safer using these headphones as opposed to standard headphones I had been using. Thanks.
The new model is lighter and slightly more comfortable to wear than the other one. Sound quality is a little better as well.
Battery life is unchanged. I'm getting about 6 hours of use before they run out of power.
If you are new to bone conduction headphones, I would recommend disregarding most of the negative feedback about sound quality. From what I can tell, most of it comes from people expecting studio quality sound on a Bluetooth headset being conducted through your SKULL. You're just not going to get studio quality sound on any bone conduction devices.
The biggest positive for using this style of headset is that it allows you to not be cut off from the sound environment around you while you listen. Running or bicycling where you need to keep situational awareness, is much safer with these. But you will take a slight hit on sound quality.