I did the clean 9 myself back in November last year (for my brothers wedding)
I did shift 9lb, but the minute I finished I obviously had Xmas and Brothers wedding so I put the 9lb back on along with another 3lb, and I was never that heavy.
It didn't work for me (I wasn't a fan of the shakes), I thought it was a waste of money.
Im getting married this September and ive joined Yoga, im doing a Paleo diet, and walking 15km a week (I do 3 km a day at lunch time) and Im slowly loosing it.
I still have my cheat day and still go out with H2B and friends but I watch what I put into my body now more than ever.
In total since starting mid April i'm down 5lb and toned up a bit,
My honest opinion is that the fad diets or detoxs are great for a quick fix but they never last long and once you finish the diet/detox weight will slowly creep back on.
best of luck with whatever you decide on.