I own a Smiths, not this one but the black dial Navigator PRS-48. Absolutely love it, it runs about -2 secs per day, although it's a different movement, a Sellita SW210. The purchasing experience leaves a little to be desired as the store only opens for a couple of minutes every few months, so you have to be quick/lucky to get what you want. After reading your post I've just been on the CWC website and it has helped me decide that I definitely need a G10 😀

I get a strange satisfaction from keeping my watch in a certain window of accuracy and going as long as possible without having to set the time. My current daily driver runs about -2 sec per day in normal use. I used to set it about 30 secs fast and reset the time about once a month. But it's fun getting to know the characteristics of a particular watch over time and how it gains/loses. I don't have a timegrapher, but I noticed my watch gains a little when left dial-up, so on days when I wear a different watch I leave it dial-up all day to get a few seconds back. I just checked and my watch is currently 3 seconds fast and I don't think I have set the time this year yet, and that makes me far more happy than it probably should.