Sascha Rogmann lives in Uedemerbruch.

Mapping: Kreis Kleve and Münster (Westfalen).
Devices: GPSmap 60CSx (prefered), edge305
Devices not used for mapping: eTrex Vista HCx, WBT201, geko201

I compared the saved tracks of the devices mentioned above. The tracks of GPSmap 60CSx (Sirf III) had the fewest deviations. The Vista HCx has dependencies of the direction: If I drive along a long straight road in both directions the tracks don't match. The tracks of the WBT201 have small dents sometimes.