Prostate removal with robot - does it have fewer complications or not?

Good question . Complication rates are surgeon dependent, not dependent on the technique used. A very experience open surgeon will likely have less complications than an inexperienced robotic surgeon. It is pretty clear however, that in general with robot-assisted laparoscopic radical prostatectomy, blood loss is less, hospital stays are shorter, and patients return to work sooner.
No. The davinci robot gives incredible vision and dexterity but you do sacrifice your tactile sensation (no touch). No large study has shown a benefit vs open. What you want is to make sure your doctor has done a lot of whatever he's offering. For more: www.Peedoc.Com @thepeedoc.