You can train anywhere in the world now, properly, without measuring your training route previously with a bike, map, google earth and so on. If tomorrow I told you to run, a 4:10/km pace with a surge of 30 seconds every 3minutes, on your next race's actual course, between 10km and 17km mark, you can actually do that. If I told you to run 14 X 400 on the road in a straight line on 3:20/km pace, with a recovery jog on 5:30/km pace and you can restart your run-intervals, when your heart rate dropped below 125bpm, you can do it. If you went out for a longer training tempo run, where you want to achieve 3:45/km marathon pace, precise, the watch gives you instant pace and you can dial in your effort. 100%