Overall, staying here for a few nights would probably be good, but I wouldn't recommend staying for a week or so (I was there for a week). Here's why:
Pros: The apartment itself is pretty charming. Its best feature by far is the bathtub, and it's easy enough to settle in for a couple of nights. The location is fantastic, although be aware that if you are relying on public transit in PDX, you'll be taking the bus (which is timely and easy!). Jeff was very responsive and helpful with problems, and clearly takes his role seriously.
Cons: I really wish someone had mentioned how loud it was before I booked as I would have booked elsewhere. You can hear every creak, conversations upstairs (this is a first level apartment and I think Jeff rents out all 4 apartments in the building), the door slamming when people leave. The other red flag that I need to call out is that Jeff sent me a message after I left encouraging me to leave a review (as a former host, I always do anyway), mentioning how his Superhost status is really important to him and how a 4 star rating actually hurts him. It's technically not a reportable offense but I felt I needed to disclose it.