It depends on how big "big" is. They can do amazing things but some dents, too big, too deep, poor access, etc. they can't work with. There's no reason not to have someone look at it though and give you an estimate. If they can do it's much better than getting out the bondo and paint gun. I prefer the mobile guys to the fixed overhead operator - they seem to be a little cheaper but still do good work. Ask around and you should be able to find a good one.

Paintless dent removal really works for the type of damage you show. Usually, they want you to go thru your dealer so they can do it at his location. The person they use would probably do a good job too. The results are VERY dependent on the individual doing the work. I was lucky, a friendly body shop referred me to a local guy who was willing to work on my driveway. $100 vs body shop $500 with repaint for a door crease. I was amazed to see him work.