Chiara,
I am so sorry that I have not been on this website for over a year. But yes, I did have my surgery with DR. Celik in Istanbul last year, and it was a complete success!! I am off of all of my diabetes medicines, and am just slightly out of normal A1c range. (I am at 5.9)
Also, my weight, cholesterol, and triglycerides have all come down to very healthy levels.
While I do still try to eat healthy, I do not have any diet restrictions, and I feel great!
I recommend DR Celik and this procedure with all of my heart.
Good luck