X.O.
When I do Weight Watchers I lose both ways, meetings and online, but have more success with the meetings. But, you have to find the right one. Sometimes the one closest to you won't have a leader whose personality clicks with you; sometimes there will be very irritating members who constantly interrupt the leader, etc. So, I'd try it out and be willing to try multiple centers.
I don't use the books, except for the pocket guide. I find it easiest to track with my iPhone.
I have never bought a scale, but I wish I would have. When I resume WW after this pregnancy, I will buy the scale.