Does anyone had Dr. Tvetenstrand....

Hi, I had a vbg 7 years ago and lost only 50 pounds, but regained it all back plus. My Pcp is sending paper work to Dr. Tvetenstrand to do a RNY, my question is does anyone know if he is good? Also, has anyone had a revision done by him? I am so anxious to get the process started, but I have only had the psyc. eval done so far and they said I can have it. If anyone knows it would be great! Thanks, April