Let me try to answer this from my own personal perspective....
First off, my entry into Weight Watchers was via the internet in helping to build the WeightWatchers.com business. I use one of the two internet products, Weight Watchers eTools (for people who go to meetings) ALL the time. I track POINTS, I use the weight tracker, I use the recipe builder, etc. I love it all.
That said, I have only had success losing weight by also going to Weight Watchers meetings. Certainly part of it is the tremendous amount of tips, tricks, concepts that I have learned over the years. I could go on for days on dining out tips I have picked up in my meetings.
The other very significant variable in my personal weight loss equation is the scale (hence the name of the blog).
I suppose I am a pretty achievement-oriented person, and I am a big fan of praise and positive affirmation. Said differently, I would rather get a good grade than a bad grade. The idea of being able to get a score delivered to me by someone else keeps me highly motivated and focused. Knowing that I have a weigh-in awaiting me on Wednesday at 11:30 AM keeps my game on throughout the week.
During the six weeks in which I was trying to qualify for Lifetime Member status, I sweat bullets every time I got on the scale. One might ask why I can't just weigh myself on a home scale and be done with it. My answer is that this simply doesn't work for me. I need to have someone else weigh me and then write the weight loss in my member book. I thrive on the challenge and the praise, and I cannot stand the idea of backward process.
The psychology of weight loss never ceases to fascinate me. The scale is just one part of the behavior modification formula of Weight Watchers. For me, it's a big one.