I just spent 5 nights here in Portland. The studio space is immaculately clean and Alex has provided so many great small details that made my stay very comfortable. The location was close to my destination (Oregon Convention Center) and in a very fun part of town. There are tons of great shops, restaurants and bars all along Alberta Street - very eclectic neighborhood.
The bed was just ok for me - it was a little too firm but not bad - just know that if you like softer beds this may be too firm for you. I also like to cook and while the kitchen had some basics, it was very small and therefore limited what could be prepared in the space. There is no dish rack for washing plates which would be helpful.
The one thing that was difficult for me was the entrance to the space. There's a garden path you need to walk up to get to the gate where you enter the courtyard to access the front door. The stone steps on this path were not stable and made hauling my wheeled suitcase difficult. Also there are solar lights along this path but in the Pacific NW during winter, there isn't much sunshine to charge the solar lights so most nights the lights were out by 9:30pm. So if you are arriving late you may need a flashlight to negotiate your way to the door.
The house is located on a street where there is a bus line so you can hear buses going up and down the street during regular transit hours. Also you will probably occasionally hear Alex, her children and dog through the walls. It's not overly loud but not quiet either.
Other than these minor details I enjoyed my stay.