Oxylean 1-3d is awesome. I've lost 4-5kg in about 3 and a half weeks and almost have a flat stomach. I'm 5 ft 6, and weighed 74kg when I started, and now I'm around 69/70kg. Granted it's mostly caffine that I feel but it suppresses appetite and gives you energy too. I feel great, just make sure you eat. I'm tending to stick to mostly protein and a handful of carbs but I've been impressed with the results.
I'm pretty sure I would've eaten more if I hadn't been taking the tablets, so there is the positive effect for me. I'm not sure what else it's done because I haven't tried to lose weight without taking them.
Edit: I should add, I've been very motivated and go to the gym at least 6 times a week. I highly doubt the pills will work if you only take them rather than exercising