last year I bought a Revue-4, which is a rebranded FED-4. It is difficult to spool back the film - small wheel - so you should practice the loading/unloading process with a film "sample" before you go live.
Do not forget that the shutter curtain is very sensitive to sunlight, always put a cap on. --- the shutter curtain on my copy was already destroyed, so unluckily I got a big light leak thru the first shutter curtain, looking very unpleasant on each and every negative.
I haven't tested the camera yet. I literally just got it yesterday and we are moving places this weekend. But as soon as I can I will make a video about the camera and post videos!!