My cousin has had success with NS, especially when her DH is away for extended periods of time for work. However, when he is home, he loves to cook and he's a good one. She has found the food to be palatable (sp?) and filling. When she's home (she and DH are both crewing the Yacht over in the Med. this summer), NS ships right to her home and it is very convenient. She only has to shop for salad greens.
My FIL is doing Jenny Craig and gets very bored with the meals. He does well if he sticks with JC, but he doesn't exercise at all, so the weightloss is exceptionally slow. He has had difficulty going back to preparing his own, healthy-portioned meals when he is trying to maintain losses (he's been "stair-stepping" as part of his plan...so much loss then a maintenance phase, then more loss, but he can't maintain the losses.) When on JC, he supplements those meals with fresh salad greens and some fresh veggies/fruit at times depending on the menu. BTW, he became an excellent chef after his wife died and so he is used to very flavorful foods. JC is very bland to him.
My fear with any meal replacement plan is that transition back to the real world. With the plan I'm on right now (HCG), they wanted me to use their shakes and MCT oil four-times per day for breakfast and snacks in addition to very low calorie lunch and dinner (all my own prepared foods). I'm alergic to coconut and both the shake mix and the MCT oil contains diratives of it, so I opted out. They weren't real positive on substitutes for the shakes other than occasional egg whites if I'm supper hungry. Still, I have a feeling that if I got to be reliant on the shakes, finding those appropriate, healthy breakfast or snacks would be more difficult once I'm in a maintenance mode.
Price-wise, it looks like NS is less than JC. I had a colleage that did NS for awhile and then basically broke down the contents and portion size for herself and fixed her own meals with the same results - 1 to 2 lbs lost each week, but she still yo-yos with her weight overtime.
Best of success,
Laurie