I have never done any juice cleanse in my life and was VERY hesitant as I was convinced I could not go even 1 day without chewing on food and was also under the impression I'd have zero energy. I work out usually 5 days per week and stuck to my routine and actually had a very positive experience on this cleanse. I did the 3 day cleanse and didn't feel the need to eat any foods. I also don't drink coffee so also didn't have coffee either. I know there is the option to have it black- my boyfriend and I did this together and he drank black coffee every day. We were both successful in the 3 day cleanse. I even had the energy to take 2 spin classes back to back on the 2nd and 3rd days and a high cardio/strengthening class on the first day. I felt very good, not very tired but I will say I think the sugar in the drinks impacted my skin and I think made my break out as I'm not used to taking in that much sugar. Other than that though I had a great experience and do think I'll be purchasing again but doing the 5 day cleanse next time!