Agree, Before 2 years I took clen/EC for 2 months (2 weeks clen - 2 weeks EC), my diet wasn't so good so I lost few kgs, but it not meet my expectations.
Before a year, I took clen/EC for 2 months, I saw better results beause my diet.
In the bottom line, your diet will determine, the chems will help, but not do the whole job.