I have used my R3A for over a year and a half, shot at least 50 rolls of film (roughly 1800 exposures) and haven't had a bit of trouble with it. I carry it with me almost every day to work in my book bag. It is a great camera for the money. I am a shoot with both eyes open person and really enjoy the 1:1 VF. I use the 35/2.5 most of the time and usually use the 40 frame as a reference. If framing is more critical (critical framing is a relative term with RFs), I pop on an external finder. I really like this camera and do not regret buying it. As someone said earlier (Didier?), it will take a while to come up with a good idea of long term reliability. This is not a Leica, so I don't expect it to match the "legendary" reliability. But, I don't expect to be around as long as some cameras have either. BTW, i just sent Stephen a deposit for an R4. Whatever you get -- have fun with it, and have a Happy Birthday!
Mike