I found the Fuji GF670 to be a poor performer in cold weather. By cold, I mean anywhere between 50F to around 32F. It didn't matter whether I had a fresh battery in, or kept the camera in my camera bag, or had it close to my body underneath my coat, when shooting at those temperatures, the camera meter and eventually the shutter stopped working. I found this to be the case when I traveled with this camera for a week, exposing it to those temperature conditions.
Before I detail my experience with this camera, I want to make sure that I'm being measured in my answer here. So disclosure: when I traveled with this camera, it was new for me. I bought when B&H started selling some new old stock earlier this year from a cache that FujiFilmUSA reportedly discovered to have been sitting in some warehouse all along. So no doubt my limited experience with the camera shaped my experience. The malfunction warnings that I got when I used the camera in cold weather--the shutter readings blinking, and then eventually the whole array of shutter speed readouts blinking--bewildered me. I also wasn't consistently paying close attention to whether the shutter actually opened or not each time I hit the shutter release button. I thus foolishly assumed that I was able to make an exposure despite the blinking lights. I assumed so because without fail the camera let me advance the film anyhow. So, I could definitely have been more vigilant about the camera, more circumspect about what it was doing. All the same, I also think that it's a serious design/engineering flaw that a battery-dependent camera would fail to disable the shutter advance when the meter and the shutter actually stop working. Moreover I also think that operating a camera between 50 and 32F and expecting it to work for at least more than 5 minutes is not too much to ask for.
I did try to get some help from FujiFilmUSA about my camera. But the sense that I got from this interaction is that the trouble that I was having with their product is basically on me.
Anyhow bottom line I do think the camera is good-when it works. I also think it's got some serious design or build issues. I no longer have this camera. In fact, I no longer have the two that I had. Both were from the same newly found stash that B&H sold. Both acted the same way.
Thanks for the wishes on the Makina search.