I have the 600, 3k, 50k, CeOx and Alox. I am content with them, I especially like the 600 to reach the meetpoints and 3000 to pre-polish.
Like they advertise, they really are not cutting laps. However, for smaller stones, they can be used to cut most facets. These were the first/only laps outside metal toppers I have, so I cannot compare to the other types of laps like Batt, Ceramic, etc.
I’m having trouble with my first sapphire (natural Ceylon). I’m getting a lot of orange peel at every level which they claim should be eradicated using their laps. But maybe I’m doing something wrong or should use another grade they offer in between polishing.