Sarah's place is really a great choice for a stay in Portland! The location is generally very quiet (although the walls seem kind of thin - so I could hear the neighbors from time to time) and the place is super comfy to stay in. The unit os on the first floor with a 'storefront' like opening, so you can get into the apartment right from the street without having to deal with any sort of tedious lobby or anything, making it great if you want to really feel like a local. The bed was a foam mattress and really offered a great night's sleep and a good amount of plushness. They also stocked the fridge with waters and coffee for me, which was really nice.
Overall, I'd definitely recommend a stay at Sarah's! The nearby area is great for an extended stay and it offers the perfect blend of comfort and quiet with a good few options of nearby coffee shops and nightlife.