Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Where am I? How fast did I get there?

I got this for my wife, who runs and likes to know how fast and how far she goes. Seems to work as advertised, and although it seems big, she hasn't complained. I can see using it for hiking as well, as it seems really accurate. Loads satellites quickly enough when you turn it on, which was a worry when I read other's reviews. HRM seems to work well, too. Pretty neat. We haven't used it enough to challenge battery life.