I agree with the above posts. I tried ediets a couple of years ago and found it very time consuming, checking out the shopping lists & recipes etc, and swopping things around if you don't like the meal ... I spent ages on the computer!
It's good in principal, and yes it does work if you follow the plan, but like any 'diet', you need to stick with it for the rest of your life if you're going to keep the weight off permenantly ... otherwise, once you go back to your old eating habits, the pounds soon follow.
I've given up on diet plans now and decided to do my own thing. For me it's got to be a lifestyle change ... something that I can stick with for the rest of my life ... not a diet that I "go on" for a while until I've lost weight, then "come off it" and go back to my old eating habits. I feel a lot happier and in more control as I don't feel under pressure to be "following a plan". I'm sticking to healthy eating, with the occasional treat which I no longer feel guilty about having, and therefore I don't end up bingeing on something because I feel naughty and think I shouldn't be having it because I'm supposed to be "on a diet".
At the end of the day, we are all different, and I'm sure it works for many others, but it wasn't for me. Good luck with whatever you decide to do