i had last minute change in my trip schedule and had to book in the morning same day i was arriving. David responded in around 15-30 minutes and that allowed me to plan everything well.
I didn't have chance to meet in person (arrived late, and departed while host was away).
Place is nice, just what you want if visiting Seattle shortly. 15-20 minutes drive from Space Needle, i've seen bus stop near condo as well. I am happy with my stay at this place.