Firstly, there was a lot less blood than I expected. Actually, for the most part, this game is more or less bloodless which is especially surprising when you consider that "Blood Loss" is a key losing mechanic in this game. Sure, you get little blood spots on your hands and arms during a procedure, but as far as drops, puddles, pools, squirts, or sprays of blood, I was surprised by their complete absence. It was a good surprise.
The surprise that I didn't like was just how obscene the entire game felt at all times. Ripping out a person's lungs with my bare hands does not feel good, even when I know it's fake. It just felt very wrong, like I was desecrating something sacred. I've been a gamer all my life, so I've done some terrible things in the name of high scores and victory screens, but this was one of the actions I have felt least comfortable with. The somewhat cartoony visuals made it feel even more bizarre, and I can't decide if more realism would have been an improvement or not.
And the controls! My heavens the controls!!! They were simply terrible, and more or less seemed to be so intentionally. For me, that does not add a layer of complexity or mystery or anything else; it's just irritating. It made the game feel like you were playing Operation (which I imagine was point), except there's someone sitting behind and purposely constricting your movement the entire time. Eventually, you would want to punch that person in the face. While playing Surgeon Simulator 2013, there is no face you can punch, it's your own face, constantly slamming into a wall of terrible controls until you either win or lose, occasionally at random.
All in all, I'd put this game at a solid "Try it." I have no intention of ever playing it again, but it was a pretty fun time for a little while. Even better, I'd say to play it with a couple of friends, so there's someone to enjoy the antics with (just like the original Operation! :O).