Another vote for the ORIGINAL... I didn't even realize it was franchised until I checked out the website you posted and know nothing about the other locations.

We discovered it in Portland about 25 years ago while I was attending summer school in that lovely city. In fact I believe we saw one of the original owners (who has sinced passed away) in there more than once. It was well worth the 45-minute wait some Sunday mornings and we gradually ate our way through the menu. We've returned there every few years when traveling in or through Portland and the quality remains high AFAIK.