I've been to about all of them, I use whichever has the best coupons available for what I need. McCords Vancouver was by far the most thorough, I'm confident they actually checked everything they said they did on the checklist vs the norm where all the other dealers just pencil whip the forms and write phantom issues and such. Their new facility is real swanky too.
Lately I've been having good luck with royal Moore. They have the skankiest facility and waiting room of them all but they seem to have the fairest prices.
My last three oil changes have only been $12 with a coupon and bringing my own oil.
Broadway was fair, Gladstone was fair, Beaverton has a lot of bad reviews and I went in there once and didn't care for the employees I met. Haven't been to wilsonville or Tonkin. Capital in Salem has some real duechy advisors and they're always trying to screw us on our lifetime oil/tires on a corolla we have.
That's been my experience so far. Interested to see if others have a favorite. Of course...your mileage may vary.