I can not really see much advantage in Da Vinci.
I had open operation a couple of months ago and the problem post operation is urinary incontinence. This is result of damage to pelvic floor muscles and veins surrounding the prostrate.
The Da Vinci saves damage to muscles and tissue in the abdomen but it does nothing to save the pelvic floor or veins in the prosterate.
It is much more difficult for a surgeon to make a good job using Da Vinci and if there is accidental cutting of a vein it is much more difficult to control bleeding.
Most important the surgeon can not feel any texture though the Da Vinci instruments. In my case the surgeons could feel the lymph glands and ascertain there was no trouble there, They can not do that in Da Vinci.
No doubt Da Vinci saves damage to abdomen, but this never causes a problem in open RRP; just read thes blogs and you will see no one ever has trouble with their abdomenal incision.
As said in many other blogs above your best bet is to find a surgeon who does many RRP at least two per week.
I hope all goes well
Open RRP 29 April 07