Back in 2011, my family and I drove over an hour to a farm and bought a 50 lb bag. Most of it is stored in buckets, the rest at home is in old 1 kg MSM containers. We have only finished a quarter of it and given some to others.
DH has been more consistent in taking it than I, mainly to aid in digestion. I have taken it at least several times a year over the years, but recently decided to be more consistent to see if it can help ease the aging process.
Right now, I take a great heaping teaspoon (looks like over 2 teaspoons) in white grape juice an hour before food or supplements. Thanks to enzymes, I am regular, so I will be looking for other results.