[BEM-S4]

I have one and have been very happy with it. I got a Monowear bracelet for it so it basically resembles a blank tank watch. The only downside is that it won't pair with BMW BT so if you leave the phone at home and want to take a call in the car you have to do so with the watch, not the car.

My battery has never run low and I wear it all day, charge at night. I am a light tech user and don't go crazy with apps on it, but leaving my phone at home is awesome when I go out to dinner / cocktail in the evening. People can still get me in an emergency and I can text to meet up with folks or whatever, but the real game changer here is the ability to operate sans phone when you're out for the night. At least in my book.