I have tried dieting over and over again, and am starting to get fed up, depressed etc.
I have come across a site that sells fast weight loss pills. And am in two mind whether to buy them or not. The adverts and "customer" feedback make it seem real and that it does what it says (increases your motabolism, causing you to burn off more calories faster)
Any comment would be apprecited
Thank you.

no they dont, period. only diet and excercise work. if your diet failed it was because of a variety of reasons, eating too much still, cheating, eating too little, binging, lack of excercise... the list could go on, get help from a trainer and nutritionist, those pills are expensive and dont work, a trainer is expensive but if you do what they tell you to do, it works!

Li da works, but its risky, it might give you health problems in the future, but that only if you take it for years. I took 2 months worth, it helped loose my appetite so i didnt think about eating all the time and gave me energy to excersise. I recommend it.

The only way to diet is to go shopping for clothes that you will not fit into now, but you will if you lose 50 lbs.
Now that you've spent all your food money on clothes that you ccan't wear, you will be forced to starve until you can fit into your clothes.
Unless you go out and about naked.
But if you're fat, you won't want to.

It depends what kind you get.
The more popular ones these days are the thermogetic ones which makes your body heat up which then burns more calories. I tried Hydroxycut or Lipo 6 (allstarhealth.com - cheapest place I've found them) which worked. It gave me more energy and controlled my cravings to eat.
You have to realize that you also should increase your exercise and watch what you eat. Not to be a complete diet head but to still watch it. Substitute fruit for fries. Yea, it sucks, but hey they pay out is worth the 4 weeks or so you're going to be on it.
Nothing is a miracle drug. If there was one out there we'd all take it.