I bought this entirely for its "manly" looks and if it did all it claimed to do then that was a bonus. So does it do all it claims to do? Yes it does. Updates via the atomic clock, battery charges from solar energy, auto EL works a treat, moon and tide functions work perfectly, world time is spot on, fits perfectly and doesn't move around on the wrist (the 2 flaps underneath the wristband see to that), the negative display is perfectly legible under most conditions, various display options work great...and it looks great too! One thing though, when you get it first it's a good idea to expose it to bright light (preferably outside) for a few hours to give the battery a good charge due to the fact that it will have been devoid of light in its packaging. 5 star purchase and as always great service from Amazon.