The Ricoh KR-30SP was Ricoh's replacement for their XR-P. It's largely the same as the XR-P (which you might be able to find more reviews of) but with a more plasticky build.
I used an XR-P for a while and was very happy with it. Compared to contemporary Pentax K-Mount cameras, the XR-P (and KR-30SP) is more fully featured and can be found for pretty cheap. The real draw of the system for me though was the lenses. Ricoh's Rikenon lenses are excellent, the 50mm f/2 being super sharp and cheap, as well as the 28mm f/2.8. The "P" versions of the lenses allow for Av, Tv, and P modes to be used on the camera. Unfortunately, they predated the Pentax A series, so while you can stick a Pentax A lens on the KR-30SP, you won't be able to use the program modes.