I've had great luck at Jenny. I did go into the centers because I need the accountability of being weighed in front of someone every week. The food is good, especially the frozen food. The 'pantry' food is good, but not quite as good as the frozen.
Having said that, my husband and I each kind of hit a plateau (we were getting a little careless too!) and wanted to do something different to jumpstart a new losing cycle. I read Dr Fuhrman's book "Eat for Life" and we're currently on his 6-week plan which is pretty much a diet of fresh produce plus some legumes. It's working well and we've started losing again. We're close enough to our goals that we'll probably not go back to Jenny - we'll see.
Anyway, I vote for Jenny but think about going into the centers if feasible. I, personally, am just not as accountable to myself as I am to other people
Good luck.