I packed up the Polar RS800sd and am shipping it back to RoadRunner Sports. The red button is too sensitive for daily wear and requires me to mash it down several times when I am running. Yes, it's has some nice features but for $460 I need it to be much better than it is. Too bad, because they now have a GPS sensor for the RS800 (instead of the W.I.N.D. sensor) and I'm sure they'll have other add-ons, too. But it was becoming more trouble than it was worth so I'll wait for the next version.
. . .
Yes, anyone can be a distance runner, but should they?
The advantages of running partners.
Finally, save yourself some money on a watch that measures distance and use this instead. Read the instructions, once you do it's a snap.