I've got 3 solar watches and so does my wife. Mine are all Casio. Two of mine are Waveceptor models, sometimes called "atomic" and reset via a national time standard radio signal in the middle of the night every night. My wife has two Casios and one Citizen. Oldest of the six is a
13 year old Casio Waveceptor. All keep the same time you'd normally get from any quartz movement. I never need to set (or reset) the two Waveceptors. My only caveat is that you should get in the habit of placing solar watches in the light if convenient, when you're not wearing them under a long sleeve. This is especially true if you get one with an "atomic" movement. The reset in the middle of the night uses more battery power than does the quartz time keeping circuit and I learned that they will deplete and go into deep hibernation if allowed to go several months without sufficient light. Otherwise, a few hours a week in direct sunlight or just putting it near a windowsill routinely when not wearing it reliably keeps it going. The all digital non-Waveceptors never seem to never need direct sunlight. Indirect light is sufficient.If I ever need to buy a new watch, I'll never get a battery powered model again. Nothing worse than having a battery fail at the wrong time and missing an important event or transportation connect. The battery powered Seikos second hands skip 2 seconds instead of one second when the battery is weak and needs replacement. It's a good feature, but even so, why bother with a battery watch any more?