People keep motivated because they keep seeing positive results from their new program.
The combination of flavors with shakes, bars, cereal, and entr e's makes for variety in one's meals and people love it. Third, the diet is totally convenient. The entr e's are all pre-measured and beautifully packaged along with the bars, to pick up and take with you anywhere. The busy lifestyles of Americans lends itself perfectly to such ease. Fourth, nutritionally it is balanced and complete.