Unfortunately, the GPS reception is insufficient, it is a godsend if the clock gets a GPS signal. In about 50% of cases the clock does not receive a sufficient signal. Then you have been waiting for 10 minutes and then frustrated running at last going with a much too expensive stopwatch wrist (because I can take my old 15 Euro Casio ...) At first I thought it had something to do with the weather, but it did not, even on routes that I ran previously no longer walked the GPS reception 2 days later suddenly. I run in the park or forest, there is always a clear view of the sky.
Since about 4 weeks starts to replace the bracelet clock. This way I can no longer use the clock because I have to reckon that the bracelet at all times completely detaches. I'll return the device.