It's really good! Extreme relaxation. You get clay shakes that fill you (and sweep your intestines clean) and lots of herbal supplements and a soup in the evening. But no solid food ;)
The first food afterwards is amazing ofcourse, but you also can't eat too much because your stomach shrunk a bit ;) And you can't go straight to having a steak - first fruits, the next day veggies, the next day maybe eggs, etc.
The trick is keeping it all up afterwards!! It normally takes about 3 months before I'm starting to eat Nutella etc. again :D It's a great kickstart for anyone who wants to make a lifestyle/diet change, and you also never get sick anymore, because you're completely clean on the inside :)