I was on WW online in the states, and now WW Online in the UK.
Its a great program, there is SO much information and inspiration to find. The people on the forums help tremendously and there are challenges and support on all levels.
You DO need to record and measure everything you eat - but you are supposed to be doing that anyway. I find the online tools make it extremely easy to do so. And I'm pretty sure they have WW apps that connect from your phone to your account, so you can still input while on the go. At least, i have it here and its a lifesaver.
The only thing I would advise...is to actually stay away from having the bulk of your food be WW prepacked food. In fact, any prepacked food is full or preservatives and salt, which slow down your metabolism. Stick with real food whereever possible. You'll find its easier to lose, plus you don't end up eating a whole box of their snack cakes because you have the points left for the day (I've done that....didn't help my weight loss one bit).
Good luck to you!