Diane gave me this hydrometer several years ago but I haven't used it. But we've remodeled our kitchen so all our stuff from the living room and kitchen have been stacked in the garage and I can't get to my my regular hydrometer and can't find my refractometer so I pulled this one out. The problem I have with it is that it's very big and requires twice as much sample to fill the tube. The advantage is that I have twice as much hydrometer sample to drink, and it is more precise since the scale only covers the FG range. I've never used my refractometer for FG readings, it's not accurate without math and there's no sample to taste, and the sample tells me much more than the numbers alone will ever tell.