soaked for half an hour, and it holds water pretty well, the soft side will build up mud and get a little pasty if not refreshed with water every so often, but it's very manageable. it raises a burr quickly and i'd say the speed is good, gessh 600 is slightly faster. less aggressive than the JNS 300 with smoother feedback, leaves a pretty consistent scratch pattern that does not dig in deep like you would expect a 600 grit stone to. have not tried a gessh 400 yet, but will get an opportunity soon.