Ehh... I'd leave that one to the professionals. I've seen a video online where they warmed up a dented area with a hairdryer or heat gun (can't remember which) and then sprayed it with a can of compressed air for cleaning keyboards by holding the can upside-down so the frozen liquid squirted all over the paint and the dent magically popped out. I don't think they showed extreme close-up shots from all different angles but I'm sure there were still a few imperfections. I'd only do that to a car I didn't care about at all just to amuse myself or someone else.
I've also personally used a Ding King on my old Eclipse - I had a nasty dent in my right rear quarter panel where it looked like someone took their knee or elbow and hit it straight in and a friend of mine gave me his Ding King for free so I decided to give it a try. I was able to get the dent out by pulling it many times, but I was left with all kinds of nasty ripples. The paint was ok, but it still looked pretty bad. I wouldn't do that to any car ever again.
I did, however, take my 07 WRX to a dealership after it was hit by a shopping cart shortly after I bought it. I had the dent professionally taken out by Dent Wizard using their paintless dent removal system (they travel around to several dealerships around me, so I just had to call and find out when they'd be there and schedule an appointment). My dent was at the compound bend in the rear fender right by the gas tank so I saw it every single time I got gas and it annoyed me enough that I decided to get it fixed. Let me tell you, they did perfect work. The dent is completely gone and the paint around the area looks absolutely perfect. I'd recommend those guys to anybody. I can't remember how much I paid exactly, but it was reasonable - maybe around 80-100 bucks, but I also had them buff out several scratches in other spots. For that kind of quality work though, I'd probably be willing to pay several hundred.