There are several good diet plans available, and generally people will gravitate to something that makes sense to them.  With Medifast, not only is the diet plan a solid one, but they consider mental preparation extremely important to your long-term success.  When you join their VIP membership, you immediately have access to a support community, as well as a book written by the Medifast Medical Group.  They also provide support from their team of registered dietitians so that all of the bases are covered in the area of preparing mentally for your weight loss journey.  In the VIP plan you also receive 70 Medifast meals (2 weeks worth of free food), online meal planning, free shipping, and a lifetime 5% discount on all future orders made through your VIP account.  Purchase in bulk and simplify your life.