You can set what alerts you and what doesn't, it is a great fitness tracker, GPS, etc... You can respond to text messages, or reject phone calls from your wrist. (Handy when cycling) The "find phone" feature helps me when I can't remember where I set my phone last. I only charge it when I'm in the shower, but the battery easily lasts a couple of days. It's water resistant, but me personally, I wouldn't take it in the ocean. It's lightweight, and small, but can still display a map of my rides. If you get the right face (there's even an LCARS face), it's quite pleasant to wear. I thought it would be a fad, but I'm sold now. I'm not a huge fitness nut, but still really enjoy wearing it.