I ordered the $35 one and my sister ordered the $85 one and we shared. The quick start one is great for long term, establishing healthy eating habits and the info provided with it is great for portion control. The bulge buster one is super effective if you stick with it! I really dont have any real weight to lose, was just looking to get a bit leaner, and in 4 days I lost 5 lbs. Too much for me, so I just used it as a guide and added more healthy foods to it. Since then - about another week, i've gained one pound back. If you have weight to lose, I would think the 85$ one is good enough, I cant imaging what the more expensive one will give you that the mid-range one doesnt. PM me if you have questions!