I went to Jenny Craig about 6 years ago. Granted, it could be a good place NOW, they burned me out on them to the point that I will never go back.
First of all, they make you buy their food. That is crazy expensive (if I can recall, all those years ago I was paying maybe $150-200 per week for just food). Their associates aren't the friendliest people in the world. When I went, the woman that was kind of like my "sponsor" was indifferent and a tad snobby. So were the other people working there.
There is no supportive atmosphere from my experience. Also, if you want your records for future reference, good luck trying to get them to help you dig them up. I called them a few weeks ago and they basically told me to shove off.
Jenny Craig could be the best diet center in the world, but my experience sucked, for lack of better terms. It's expensive and doesn't really do much to help you lose weight.