I did the Jenny Craig program during college (6/95 - 11/96 in particular). I can't really recommend it. I did lose around 60 pounds, but I didn't really learn how to keep it off, and I gained all the lost weight (and eventually another 50) once I went off the program. The food was quite expensive (around $70 a week, and had to be supplemented with dairy, produce, etc.) and honestly not very good - some options were downright nasty. Maybe they've improved over the past 10 years?
Now, being on a diet during college was hard enough - I lived on campus (as did most students), and the dining hall was a major social center, so having to eat my meager JC meals alone in my dorm was not a great situation. And I didn't really go into the program with the right mindset, as my mom pushed me to do it (and paid for it), rather than choosing to truly commit to it on my own. But I feel like it was definitely not the right program for me, because by sticking with the prepackaged JC foods all the time, I didn't really learn how to eat in the real world. I wasn't able to make a true lifestyle change, because I knew I wouldn't be eating JC food for the rest of my life.
Anyway, that's my experience with Jenny Craig. I'm sure there are success stories out there as well. Good luck finding the perfect choice for you!