Radar Tacho RDS II Running Pedometer The Most Accurate Money Can Buy?

First developed by the Fraunhofer Institute in Germany and then put
together on the market by Siemens, the new Radar Tacho RDS II is
supposedly (they say) the most accurate running pedometer you can buy
these days.

The device relies on radar to tell your current, maximum and average
speeds, as well as your daily mileage, hence why the producers advise
against using it close to mirrorered surfaces. But translated into
English that means that if you'd like to do some cardio exercising in
front of a mirror or if you're jogging across the lake the Radar Tacho
may not be that accurate.

But shouldn't accuracy be the word that comes to mind when you're
considering a