The sound is amazing the battery life is very good, hand-free talking is ok, some people say is sound like I am underwater but other times it is clear, guess depends on background noise. To talk you need to move one ear piece off your ear slightly so you can tell if you are speaking too loud or not. The noise isolation is good though you can still tell when an important announcement like waiting for a train is happening though you need to remove to hear properly.
A1 they came out in October 2013 and got What HIFI Bluetooth awarfr 2013 for wireless headphones well deserved, so many friends who have tired them said I am going to have to get a pair of these, my brother was so impressed he bought a pair straight away.
You can also use them with the supplied cord as a wired headphones, but so far not needed to as battery has lasted. Only minor grip is they could be a slightly tighter fit on my head, but this maybe due to me constantly saying you need to try these to everyone.