It all completely depends on how far they've surfaced, how deep the roots are, and whether or not they're wrapped around your jaw.
Mine were all completely impacted but not wrapped, so they gave me a gabillion shots (my nerves aren't in the correct spots so it's a hit and miss until they numb me), hooked me up to a heart monitor, and then went to town. Personally, they had to cut my gums open, drill the teeth down in the middle until they were in two-four pieces, pulled each out, and then sewed me up with dissolvable stitches. It took about 2 hours and there were only a couple of issues. My bottom right tooth's nerve didn't numb correctly so after they drilled the hole in the middle, they stuck a shot down in it and that was rather uncomfortable. My top right tooth also got stuck, but the doc just put his knee next to my face and yanked that svcker out.

I know it sounds horrible, but it was really nothing at all. I did take pain killers for about 2 or 3 days just to get over the soreness of having all that done. (Oh, and DONT DRIVE. Long story short: I wrecked my car 2 days after my surgery.... in my next door neighbor's yard.)
You will be sore, but not in PAIN. And being you're only get two done, your discomfort should only be minimal. Don't be surprised if you do get bruises on your face too though. Some people get them, especially if the roots are deep.
Over all, getting two that are mostly or partially grown in should be a walk in the park. You'll be fine.

(But just be prepared that the doc DOES have to do some serious yanking as someone else said above.)