Love the stuff - lets me satisfy my peanut butter cravings without the peanut butter calories.
If you shop around you can get it relatively cheaply in bulk on the internet -- look for the 16oz bags (the little jars are 6.5 oz.). I bought the little jar once, and refill from the bulk bags.
Starting Weight: 260 lbs. (November 2010)
Quasi-Maintenance: 165 lbs. (June 2011)
Goal Weight: 150 lbs. (reached December 8, 2011)
Size 22W to Size 4
Currently maintaining within 5 lbs. (+ or -) of goal. I weigh daily, but also use a tape measure and the fit of my clothes to guage how well I'm doing.