The waveceptor one I had refused to synch itself properly…each morning it would be set 1 hour behind…I flew to Austria and the receiver changed to the time sent from Germany…and it then reported to be 1 hour ahead of itself…I reset it each day and each morning it would be out of synch again.
The concept is great, the solar power part is brilliant, but that particular model was rubbish.
I ended up with a Protrek something or other – has compass, thermometer, altimeter and barometer on it as well as a stopwatch – these all seem to work but again, the fancy toys need regular calibration so I've now given up recalibrating…depending on the weather I can be 5m – 155m above sea level standing at my front door – I think I'm actually about 15m above sea level in reality so it's not entirely accurate. Compass is good but altimeter and temp are a bit hit-and-miss – but that is probably the same with any device strapped to your wrist.
Good watch, seems to be pretty indestructible but is quite chunky…and I've got spaghetti arms so it can look rather odd.