Betsy's place turned out to be even more convenient than I had at first expected. I chose her place initially because it was fairly close to everything I wanted to see, but then I realized that it was also walking distance to a trolley station, which was great, saved me a few days of using the rental car. The walk itself isn't long - maybe takes about 20-25 minutes total to/from the trolley station - but be aware that the walk is a bit steep coming back up.
It is a bit close to the airport and there are some of your normal city-type noises, but I always wear earplugs to sleep (even at home) so none of it bothered me. And really it wasn't disruptive to begin with anyway - it's kind of your regular city white noise, if that makes sense.
They do have a small dog, but he minded his own business while I was there. Her family is very kind and communication was easy. I would not hesitate to recommend her place to anyone.