Weight Vest Question

Does anyone use the weight vests? I noticed that's was burning a lot more calories and losing weight quicker when I was first starting out. So I am just wondering if I get one of those vests and add 40-50 pounds back to my body while doing cardio if I can achieve the same positive results...

I just ordered one and am hoping that it will help and would like to hear if anyone else is using them here on OH.

the only time i ever remember using one was in my high school survival swimming class. It was hard to swim with an extra 40 pounds on but I remember we had to tread water for what seemed like hours with those things on.