Hi Donna, I did Celebrity Slim for three months to fit into a bridesmaid dress for my sisters wedding. I lost about 5 kilos, (I was a bit slack with the diet at times and my weight plateaud for about 5 weeks GRRR)
I think its a great way to get you going and motivated, its so easy to lose weight if you stick to it and drink plenty of water aswell.
But the same as other people, I missed real food a little bit, and for me it was only a short term solution. I have put back on 1.5 or so kilos, but I expected that when I stopped the diet.
I do drink the shakes still for breakfast because its convenient, but wont be buying anymore after the box I have because its a cost that I don't really need right now.
I didn't have a lot of weight to lose, but I was happy with the result. Hope this helps.