check in classic & vintage. if they are NOS (new, old stock) they probably aren't made anymore (which is probably why you haven't heard anything about them). i think the general opinion of cambio rino was that they made middle-high end stuff. they produce(d?) full bicycles, not just components.

by looking at the pedals, i would say the plus is that they look like you can overhaul them easily, the minus looks like where the cage attaches to the pedal is a little thin to be used for fixed gear. mks, for example, has a wide attachment area. if that point bent and broke near the bolts, not only would you then have a broken cage, but i bet finding a replacement for such a rare part would be quite difficult.

plus they are hella expensive! unless you are building up some show-bike that hardly gets ridden i would get something different, but that's just me.