My wife has gone through a similiar procedure called Vertical Sleve.
Where the Gastric Bypass will alter your anatomy (Intake and Outtake Digestive process physically) the Vertical Sleve will leave everything intact and in it’s anatomically correct positions and simply decreases the size of the stomach. There are therefore no malaborption issues nor food getting stuck as there is in the Gastric Bypass.
Before gettting this operation done, my wife did a lot of research on the different types of operations available.
Let me know if you need anymore information and I’ll see if she can help you.
on a side note, at the time, insurance would not cover the Vertical Sleve, that may have changed now as this was 5 years ago.
BTW, she has been very happy with the results and the surgery was not invasive as it was done laprascopically(cameras with small incisions).
Hope this helps.