Even though it motivates me to compete against myself and others in my age range, my one knock is that it my average speed is always slower than my bike computer by 0.5 to 1.00 MPH, which means all speed/time measures are suspect. I will work to keep my average speed over 18 on my bike unit and then on Strava it reads only 17.5 but then it probably does that to everyone, so round everyone up. Still frustrating but like all the other data provided. When one is pinging cell towers, what do I expect?