Snap focus mode allows you to set a predetermined focus distance. This is probably most useful for "street" photographers, but I find it works pretty well with kids and pets too. It's sort of like setting your f-stop to f/8 and then knowing that everything between 6 feet and 40 feet will be in focus. Except snap focus means you can have that focus distance range regardless of what your aperture is (though with a larger aperture, the focus panel will be smaller).
I don't use snap focus as my focus mode—I leave that at spot autofocus—but I turn on “full press snap.” This means I can use two modes of focus. If I half-press the shutter button, the GR III focuses normally. If I quickly press the shutter button, it uses snap focus and fires off the shot at my predetermined focus distance (I typically set it to 1.5 meters). I can't tell you how many images have been saved by this setting.
Other little features I love are the USB-C charging port (common today, but fairly ahead of the curve in 2019), built-in film simulations, and the easy-to-use user interface. The film simulations out of the box are not quite as diverse as Fujifilm's, but there are nearly as many ways to customize them, and Ricoh enthusiasts have created plenty of "recipes" to simulate old film stock and the like.
Photograph: Michael Calore
Ricoh GR III
OK, so why nearly perfect? What's not to like? Video. The GR III can shoot HD video, but it's barely usable. Don't plan on shooting video with this thing. Pretend it doesn't even shoot video. You'll be better off thinking that way. There's no built-in flash either. And the battery life is also not that great. I got about 150 shots, and fewer in low light when the built-in IBIS is working harder. Also, be forewarned: The GR III goes from one bar of battery to blinking red in a flash. Fortunately, the batteries are small, so carrying a spare isn't too bad. I also don't like that it's not completely weather-sealed. I've not had any issues with dust, but that seems to be the one complaint some owners have—dust getting on the sensor.
Despite these niggles, the GR III is still the best compact digital camera you can buy, even five years later. Many people ask whether they should wait for an update, in case a GR IV is on the horizon. I have no insight there, but I will say that Ricoh has always answered the question by saying it would update the GR series when it saw a way to improve it, and honestly, aside from the notes above, I really can't think of much that needs improvement.