This is all strictly hammer and dolly work with some Bondo thrown in. If it is done correctly, it will only be noticed if you look for it or know what to look for. It won't look 100% like a robot built door skin.
The #1 concern will be the paint. And like I said, silver and metallic paints are the hardest to match correctly. They will need to match and blend perfectly not to notice it in sunlight and streetlights. A pro shop has to have a good paint system in place. Then a good painter will blend the paint into adjoining panels to play a trick on the eye. If the color is off, the blend will keep spreading to compensate. I have seen where a door lock cylinder was punched out and they almost had to paint the whole side of the car to hide the poor paint match.
*** I worked in my family body shop for 12 years and we are still in business 65 years later. If this was my car, I would take a pass and get another one.....only because "I" would know that the damage was there and had been repaired. If you aren't really a car guy and it looks good to you after repairs and you will eventually get rid of the car, then take it and negotiate a discounted price.