I recently bought some fitmiss ignite pre-workout energy booster. It's made for women so its more about losing fat and keeping lean muscle. I'm still early in using it, but after working all day I now still have energy for a quality workout - this is huge! My biggest worry was that I wouldn't be able to sleep after my late afternoon workout. It wasn't too bad the first night, but it's still too early to really tell how it will affect me consistently.