As a teacher and presenter, I am very interested in the keynote or PowerPoint remote. I currently use my iPhone and a clicker to present to my classes, but it's a hack and clunky as hell. If I were to get a watch, I'd be using it everyday. Has anyone tried this? How is the battery life using it? And is the remote watch completely through Bluetooth? I have terrible service in the bowels of the school. Ps I'd probably use the health stuff too, but the remote seems seamless.