I agree with SONAR-from-Germany. I have two Rs (and a Zeikon, and a Leica M4-P), and I've got to say it's---well, I got the others later because I believed all the anti-plastic/not made for a lifetime noise I heard. And it may be true, but like Sonnar, I treat mine hard---drops, bounces, rain---and they keep going. I like the self-timer, too. Family pictures come easy with it, and it's nice to be in front of the lens now and then, at least for posterity.
Screw-mounts are easy. The camera handles wonderfully. It's light in the hand AND WHAT'S WRONG WIDDAT? and I'm so, so comfortable with it. I doubt many owners will sell their Rs. Why would they? Great camera. It got me into RF, and a Zeikon and Leica later, it's still my go-to. Never a problem, always a comfort.