I've been thinking about doing this forever but a few things were making me hold off, mainly the cost and pain experienced by some. However when I saw a Lifebooker deal (340 per area, large or small) I couldn't resist. I decided to have my mid-stomach and one flank done. Sounds a bit weird, I know, but one side is slightly bigger than the other. I also wanted to use it as an experiment. If there's a marked difference, I'll do the other side. The nurse was helpful, answered all my questions. Told me it was highly unlikely I'd experience any pain whatsoever afterwards (which I didn't quite believe based on some of the reviews on here).
She did my stomach first. The sucking was a bit uncomfortable, and a bit painful for the first few minutes, especially round the belly button (the nurse said 7 minutes at the most, I timed it on my phone and she was right). It made me laugh at the sight of my fat being sucked into the machine, I didnt realise there was so much there. For the rest of the procedure I felt nothing, except for a very light dull ache (similar to menstrual cramps, maybe a 3 out of 10 on my pain scale). I watched a movie in the office which was nice. I wasn't particularly cold either (which also suprised me), I couldnt even really feel any cold on my stomach. My flank was even less painful. I live quite close to the office so decided to walk home (which I didnt think would be possible either!). I slept fine and didnt really need the Tylenol I took it as a precaution. The areas a bit swolen and tender, but I had no problem sleeping. Not sure if it will get worse but will keep you updated.
As of now, if I get the results, I'd definately recommend it :)