Brad and Meg's basement suite was everything we hoped for. Nicely renovated, clean, comfortable and quiet. It's in a great area with super fast access to major highways and the airport. The restaurants and shops of Alberta street are nice and close (highly recommend Tin Shed for breakfast). Note: if you are planning on visiting attractions in the city center area, you will likely need a car or transit.
As hosts go, you couldn't get any better. We only met Brad, but he was super friendly and extremely considerate and helpful.
The only small hitch was that I didn't realize the bed in the bedroom was a double and not a queen. My wife likes to...move...in her sleep, and so it was a bit of a battle to get some rest. This obviously isn't Brad and Meg's fault though! My boys give the pull out / convertible couch high reviews for sleeping comfort.
Highly recommend considering their place if you're visiting Portland.