The item in general is not bad to use, well constructed and reasonably accurate. But the ability to calibrate it leaves much to be desired. It is hard to remove the cover to get at the adjustments. The CMMR adjustment had no effect.
Maybe that was intentional but reduces its value. I can see why Probe Master (a great company for making multimeter probes) discontinued this model. It was OEM'ed by a company called Sapphire and they do not seem to be in business anymore.