I had the same side effects that have been mentioned. I did lose weight though, but i think i would of anyway without the tablets as it was a very low fat diet!
I think the tablets made me more aware of what i was eating, as i was too scared to risk anything fattening. as id spend the next hour at the loo.
Plus the worst was when i just leaked and it stained my white fabric sofa, which i had to replace .