Pros: very little down time. I had surgery on Fri (flanks) and Sat (upper\lower abs) and was at work on Monday. I was exercising fully after 3 weeks but could have gotten back into it sooner.
I lead a very healthy lifestyle but these areas were just too tough to see results. I wasn't looking for a weight loss solution, just a headstart in the gym. I already exercise regularly and eat well so this was complementary, a treat to myself. I'm not sorry for one minute that I did it.
The people who say it doesn't work probably didn't have their expectations managed properly and could have done it for the wrong reasons. I bruised some but that was expected. Within a few days I was seeing results. 3 weeks later I'm still slightly bruised but it doesn't really affect me at all. Just waiting to see the final results.
I was awake and chatting with the doctor the entire time. I have a high tolerance for pain, but every once in a while if i'd feel a slight pinch, I'd mention it to him and he'd numb it a little more. Whole procedure took 2 hours for flanks, and 2 hours for abs. On the first day, I actually went for a walk when I got home. Nothing strenuous but I walked over 2 miles to a store with a friend.
Not really any cons: i'm still healing so i'd have to say the only con is slow to see full results, which really isn't a con!