I've also vowed against the dealership. I had my fuel pump replaced a few years ago [right before the recall non-the-less]. I was gutting out my interior about a year, and realized when they replaced my fuel pump, they cut away a good section of the unibody [to access it better??], and then half-assed siliconed it back in place.
now I would love to go apeshit on the mechanic [if you can call him that] that did that to my car but it was the span of like 2 years before I noticed. I think in general the work done is crap and only in rare situations is it obvious how they just defiled your car.