Moskva-2 isn't really that complicated once you get used to it. I actually use it all the time. Here are a couple of tips.
1) Only advance the film just before shooting, unless you're doing street photography or something else where timing is critical. The reason for this is that there seems to be always some dust on the bellows. If you advance the film, then carry camera around for some time and only then take the picture, you may have dust on the film causing black spots on the negative.
2) Be methodical about checking shutter speed and aperture before exposure. It's really easy to meter, think "oh, f/11 and 1/100 seconds" and then take the picture without actually transferring the settings to the camera.
3) If it doesn't fire, you haven't cocked the shutter or advanced the film. Possibly both.
4) If the rangefinder doesn't do anything, turn up the auxiliary lens arm.
Once you get used to it, it's like second nature, though. It's totally different from a scale focus camera. You can actually even get decent bokeh out of it, if taking portraits.
This picture has a very harsh light coming from side, but the lens coating helps a lot. I did not use a hood.
For landscapes, it's a very good camera.
