Depending on the severity of obesity, there are different classification and grades of obesity. Bariatric and Metabolic Surgery (the correct term) is most effective for patients with higher grade obesity or those with associated obesity related medical conditions. 

Effectiveness of surgery will be looking at excess weight loss of 50-80%, compared to medication or insulin shots which will be lower. This will have to be weighed against the risk of surgery. For people who qualify and want the surgery, Bariatric and Metabolic surgery is an effective, safe and long term solution against obesity and it's related co-morbidities. For the higher grades obesity or those with medical conditions associated with it, the benefits of Bariatric and Metabolic surgery far outweighs the risk associated with it. 

Make an appointment and speak to your bariatric surgeon who will be able to answer your queries individualized to your needs.