Has anyone had success with slim-fast?

you see those commercials on tv and my mother tried atkins at first but said she was starving too much so she did slimfast with a starting weight of 345 with the height of 5ft6...she has lost so much weight in the past year and a half and she has never been so happy..Does anyone have a success story about slimfast like how much they weighed when they started and how long it took for them to lose the weight, did it change your life, etc...only serious inqueries plz...