I love this watch. I tried using a variety of phone apps and nothing was even close to accurate. This watch was right on the money and the associated computer program gives all kinds of very interesting data such as altitude and time splits. Processing Speed Takes a little bit of time to pick up the signal but I live in a rural area. Map Quality & Accuracy I forgot to turn it off when I went over to the garage to talk to my landlord and it showed exactly where I stopped to talk which was like two feet off the path.