Well, where do I begin...
It weighs around 2 pounds and most versions do not have straplugs (the only version that I know of that has them is the Royal 36 B, of which presumably only 90 are made and so they cost a lot more, around 1000 euro)
The focusing ring is too close to the body for me, but that may not be a problem for you. (I have big hands, the "holding" hand interferes with my "turning" hand) Mine came with the ever-ready case, which makes it even more difficult for me to focus, so I tend to leave the case at home.
The viewfinder is a small round hole. You have to place your eye real close to view the entire frame. Not really comfortable to look trough, but not bad either once you get used to it. Rangefinder patch is a nice golden circle.
Mechanicallly I only had a few cases where the "shields" that protect the shutter didn't close fully after an exposure, just took of the lens and used the tip of a wooden toothpick to gently push it free, then they snapped into place (problably some dirt or something). Apart from that I didn't have any problems.
Speeds are set by turning a small metal knob on the front of the camera, this can be a bit stiff sometimes (on my camera anyway, but I have other Robots of a different type and those have the same "feel" in this regard)
A really nice feature is indeed, as someone pointed out, the spring wound film advance. Noisy, but nice. There are some versions where you can switch between single and series exposure (about 3 or 4 snaps a second, I believe) Alas, mine doesn't have that feature.
It also has a small foot that you can "swing out", so it doesn't topple over when standing. Knob rewind, shutter button lock, no selftimer though, no luxuries or any kind really. Just a well build, solid, reliable, mechanical camera. A bit awkward to operate sometimes, but hey, it's fifties technology. And I love mine.
I must admit though that the first half-used roll is still in the camera, for a variety of reasons (none of which have anything to do with the camera itself) so I can't really reflect on image quality 🙂