I think many on here have done it and I'm sure you will get many positive affirmations. As I remember, the redder the apple the better and it depends on if they are "in season" then there is less starch. I have only done it once, my experience was not very positive because I completely crashed the morning of day 3, not sure what was going on but my body was definitely in distress and it took me all day to recover eating small amounts of regular food. My advice would be to consult a dietician or MD before undertaking what is really a significant dietary change to your system.