RJ is a wonderful host! He is easy to reach, really clear with instructions regarding check-in and check-out, and has a wonderfully clean space. His dog, Duncan, is a bonus and if you love dogs you have a chance to meet him!
RJ's home's location is perfect. Close to Hawthorne, Mt. Tabor, Division, etc. so it's really easy to get around and if you're staying for several days you'll get used to the area very quickly.
Definitely stay here if you're coming to PDX!