the pouch goes to about size of a boiled egg and is harder to stretch than a regular fist sized stomach, You feel full on not a lot of food. so smaller portions contribute to weight loss, I was a real greedy glutton, and am now not hungry, but apparently appetite returns after about 1 yr. The first 2metres of the small intestine are bypassed which is where the fats and sugars are taken from food into the body, this is bypassed so malabsorbtion of fats and sugars also contributes to weightloss along with the reduced portions. That is how my surgeon explained it and also said the mini description is misleading as is not a mini operation, he said they should have named it maxi
That said I am glad I had it as for me, I can live without sugary stuff, would take a starter over a dessert and a cheese sandwich over a cake, and I can have low fat cheese for the protein
What you need to think about is can you do without the fats and sugars as if eaten, will run right though (I haven't so this is what I believe not know)
I was also told food tolerance is better from MGB than other options, less throwing up after when on full food
Good luck in whatever option you choose x