Android wear is, in my opinion, the best os to have on a smartwatch, the simple user interface is pleasant and reliability is solid. The biggest annoyance with this watch is the battery life, with most notifications turned off for the watch and minimal use (replying to the occasional text message and changing tracks on spotify) i am able to make the battery life last about 10 hours. This is just about a full day, however, if i go out after work my smartwatch becomes a useless black screen on my wrist that can’t even tell me the time as it has died. I have to charge this watch every night, sometimes twice a day. I went on holiday recently taking my watch with me, it died in the evening of the first day and due to the hassle of remembering to charge it every time i got into my hotel room i decided not to use it and leave it in my bag until i got home (very dissapointing). Bought as a gift for my husband, who is a bit of a techie, and is therefore hard to please. He has been very happy ...