it's very easy to total these cars. As some one who has had body work done on another car, I know that people say that the car will look brand new... but REALLY look at the car. You'll notice how the panel seams come together (they should be symmetrical), how they blended the paint from panel to panel (they should match perfectly), are there any scratches/smudges on the interior panel/fabrics where they were removed, do the hinges, doors, hood, and trunk close perfectly, and of course check ALL of the mechanical/electrical features.

On my BMW the rear door doesn't close right and needs to be slammed shut, but everything looks perfect. It's these little things that become obnoxious over time.

My point is that no matter what, once a car is in a major accident it will never be the same, especially if you are meticulous about your car.
-steve