I had the same decision to make as you when I had my diagnosis 4 years ago. After I decided that surgery was best option, then I had to decide on what surgeon to use, and wheter to go with open or robotic.
In my city, my uro does about 5-10 open procedures a year and has done about 100 in her career. She was a very nice person, caring, and with a good bed side manor, but I just did not feel comfortable with her experience level with this type of procedure. Also with open, the recovery time would be a lot longer.
On the other hand, in Rochester NY, about 3 hours from where I live, there was a surgeon who does only robotic surgery and had done over a 1000 at the time of my diagnosis, and was one of the first in the country to use the Da Vinci. He was considered one of the best in the country at that time. On the other hand, personality wise, I really didn't like him all that much. He was a little arrogant because he knew he was good. He had a terrible bed side manor, and I always felt like I was being rushed when I talked with him. He always was joking around and never seemed very serious, but I could not ignore the fact he had a lot of experience.
In the end I choose the robotic surgery and experience, over open and no experience. My results where excellent. No incontinece, and no ED issues.