Band: appliance surg inserted to cinch stomach; adv.
-easier surgery, reversible; disadv-less wt loss, less sustained, higher failure rate, compl, slippage, etc. Stapling-surg restrictive procedure; adv: more sustained, succ. Than above; disadv-still easy to cheat/wt gain (e.g. Melt ice cream, then drink it). Bypass: combo restrict and malabsorp; adv: more effective; dis: bigger op, more nutr risk.