Of the choices given I'd choose the SADI, It's a bigger gun than the RnY and doesn't have the same diet limitations, plus tylenol doesn't do diddle for me. I think the SADI isn't a bad operation it's just not old enough for doctors and patients to have made all the mistakes yet. (of course in a world without the DS you'd be left with not a lot of options if you had afferent limb or bile reflux issues). Complications, Nutrition, and supplementation after DS is understood pretty well because we have people who have been living with it and making mistakes (and learning from others' mistakes) for well over a decade.