I agree with all of the above info, this is for pre-contest only. I used it as my primary diuretic on my last figure comp. It is very effective at removing the subcutns water. Also, if you take too much it will cause muscle cramps, so you need to be sure to take caution in your dosage. As with everything, start small.
I hold quite a bit of water, so this gave me fantastic results for the show. I had no cramps, but my face did look a little harsher. I looked very dry in the face. Other than that, it was great.
Which comps are you entering? Fitness, figure...? Good Luck!