I had the pleasure of staying in Jason's studio in Irvington. The studio was clean, the neighborhood lovely, and the rest of Portland was easily accessible by riding the #8 bus.
When I entered there were fresh flowers on the table and even a bowl of cherries from the farmers market. Jason is the apotheosis of hospitality, and he was very accommodating to when I invariably forgot something here and there.
I even rented one of Jason's bikes for the week, and got to bike around to wherever I needed to go.
The bed was incredibly comfortable, the shower was of a perfect temperature, and the room opens up into the backyard.
I spent most mornings walking through the residential streets, taking in the grand architecture. I can think of no better place to stay in Portland than here, and I'm already looking forward to my next visit. :)