Contrary to other reviews, I found that it is very easy to set the various watch functions for this watch. The most important adjustment is to set your home location using the exact Latitude and Longitude decimal values. Example: My home location is North 40.2 Degrees, West 77.4 Degrees. The values for any location on Earth can be found on the internet. If this setting is not accurately set, sunset and sunset times and moon phase data will not be correct. It is equally important to set the correct Month, Day and Year. The compass needle points to magnetic north, but the magnetic declination can be adjusted so that the needle points to True North to correspond with most maps. The declination adjustment value for your home setting is available on the internet. My declination value is 10 Degrees West. I am hoping this watch holds up well over time.