I've been using it for over a year. Terrific product that wards off sugar spikes. Add half a teaspoon to any kind of drink (I personally prefer stinging nettle tea) and immediately stir in three or four drops of liquid stevia. Wait three minutes and the drink will thicken to the texture of a milk shake. As a semi-solid, it's easier to ingest using a spoon. Once the pasty glucomannan enters your stomach and lines the walls, it becomes a barrier that prevents a rapid breakdown of simple starches (like breads and pastries) into sugar and slows absorption of sugar into the blood stream. Graphically your sugar spikes will stop looking like icicles and start looking like soft, rolling putting greens.