I know that many have had their doubts. I did too for a while. But after 8 flushes I truly believe it does work, and you'll be hard-pressed to find someone more skeptical than me.
It does remove "stones". But more importantly it removes toxins. The really strange thing about liver-flushing is that you get emotional flashbacks of previous periods in your life - presumably corresponding to when those toxins were initially laid down. Liver Flushing can therefore make you very emotional, which for us guys can be quite an experience! (you gals are used to that kind of thing). Also physically you may feel extremely bad and cleansed at the same time due to all the toxins.
I think the debate about the nature of the stones (legitimate though it may be) is somewhat of a red-herring. Liver Flushing removes toxins. Period.
It works if you persist and approach it with dilligence, love and a sense of humour. Like all cleansing you will feel worse before you start to feel better. But it does work. Give it time.