How effective is the water diet?

i plan on losing a tad bit of weight this summer, at the end of summer, my family and i are taking a vacation to florida because my little brother was selected as one of the make a wish participants, lots of pictures will be taken. it's an important vacation to remember, so i was really hoping it could be one of those things where you could look back on and now be ashamed of what you looked like. and not to mention it's summer, i wanna look good in my summer appeal. i heard about the water diet, and that Alto of people us it. i was wondering how effective it was, and wanted personal opinions about how it will be beneficial to try out?