We do a lot of laparoscopic Roux en Y's here in Syracuse, and they have a nicely developing multidisciplinary program here with nutritionists, PT's, exercise, psych evaluations, etc.
I believe that it is a worthwhile operation; take for example that one can usually cure patients of diabetes within days (this generally happens in around 80 to 85% of patients according to most studies).
But, unlike what someone said earlier in the post, the procedure is very risky. The literature generally reports a mortality for the laparoscopic version somewhere around 0.5%, which is obviously 1 in 200. Many patients do not appreciate this. And most surgeons feel that the actual mortality is greatly under-reported, and probably falls closer to 2%. Also, the laparoscopic version generally is possible only for the "healthier" and "thinner" of this patient population. Those with BMI greater than 60 generally are not candidates. This shifts a burden of sicker heavier patients to those surgeons who only do open-GBP's.
So yes, it's a tricky field with needy patients, but the patients are among the most grateful I've ever seen. Another falsehood is that most patients gain the weight back. This is untrue, especially if the patient is in a multidisciplinary program and they receive good follow-up *and* they were properly selected for surgery in the first place. The patients can beat the surgery by drinking milkshakes all day, but most don't do this. In fact, Roux-en-Y GBP is, I think, the only weight-loss modality in existence that I'm aware of that actually has good long term results (maintained ~50% excess body weight loss at 15 years post-op according to most studies that I've read). Some studies have actually shown decreased mortality among patients who've received the surgery compared to a cohort that has not received GBP (I think it was by Mories et al, but I'm not positive).
Anyway, interesting stuff that will be a serious element of surgery (until a pill is invented, which I feel is not *too* far off, along the lines of a ghrelin inhibitor, etc.)
Just my two cents.
Dan