I really enjoyed taking these supplements and i feel it helped me get into a routine of eating and exercise around them. They gave me a lot more energy and I was able to sustain a healthy diet around them as well as helping me lose weight in a slightly easier capacity. You can tell they have caffeine in them as the effect is almost instant. Would highly recommend this product. Only negative is the fat burner is a really large pill which was sometimes difficult to swallow. if it was a little bit smaller it would be perfect. If that's something that is possible.