the atomic clock is a bit overkill tbh, but it has won an argument at work about my watch being slow... ''my watch slow eh? google it, atomic time keeping? who's watch is right then? '' lol you can turn it off, but I've never found a reason not to have it on- i'm not sure if it auto updates, it didn't while I was in the UAE
the solar charging works fine, I've got it on super battery draining 'tilt to illuminate' too it got shipped over from the states and it was at full charge in about 2 weeks of wintertime light/office lights, its been on full ever since- it does go into a low power saving mode in the dark, the motion sensor in the watch or light wakes it up again, this again you can turn off and on.
of all the watches I've been through this is by far the most hard wearing, and versatile it comes diving, bushcrafting, urbex, it only comes off when I'm in bed, and only if I remember to take it off then
i know it's not everyone's cup of tea, like I've mentioned it's pretty big and its casio, but if I wound up stuck on a desert island I'd much rather have this than a timex!