Couple notes from my experience:
Make sure there is really a reason to pull them, not just cause the Dentist says so. A lot of Dentists are sending their kids through college pulling wisdom teeth for no reason other than the money it generates. (do some research, internet search, read up and find out if/why they should be taken out)
Two, I had mine pulled by an Oral Surgeon, they specialize in this kinda stuff and do it well.
Three, I had general anesthesia, one minute your there, the next minute your done. No problems, no aftereffects for me.
Mine were impacted, with one partially erupted and it was decaying, hence the need for removal.
Afterwards, follow the directions for care. Saltwater rinses, gently rinse the sockets, etc. Best to avoid problems and dry sockets, and dont use a straw until you are healed.
Good luck,
dago