My partner and I are moving to Portland and spent a week at Elsa's AirBnB while looking for housing. We rented the attic space and were pleasantly surprised by the size! It was a little chilly in the attic, but there is a space heater provided which helps.
We had no issues with our stay, but it is important to note before booking that you will likely be sharing a space with 1-2 other AirBnB guests (your personal room has it's own keypad and code). There was one long term tenant and a few other folks that came and left during the week. All were very nice and respectful. Just note that the cleanliness of the shared spaces (kitchen, living room, bathroom) depends on the cleanliness of the others who you are staying with. It has a little bit of a hostel vibe, which personally I enjoy.
Overall, it was the cheapest place we could stay with our own room, full kitchen, and nice neighborhood close to downtown. We would stay again!