I bought this unit with the expectation that it would work really well.  I followed all the recommended cleaning instructions, and when I cleaned a ring of mine per the directions, it looked as if it was never cleaned.  Wiping the ring down with a soft cloth made the ring sparkle more, but I could still see the build-up on the stones and in-between the stones. I am not sure if a good ring cleaner and a small soft brush wouldn't accomplish the same job.