We had a great stay at Dave and Martha's Airbnb! The place was comfortable, well furnished, and very clean. Dave and Martha were extremely responsive with communication--in particular, we had to order from Amazon a few things we forgot to pack, and they helped make sure the packages got to us. We also appreciated them accommodating us with a late check-out time. The gift card to a great local coffee shop was very nice touch as well. We would definitely stay here again!
The only thing we would note for potential guests is that, since the Airbnb is below the main residence, noise does travel through the ceiling quite easily (footsteps from kids running, voices, etc.), including over the bedroom. This wasn't an issue for us at all, and it's nothing raucous or overly intrusive, but if you're easily woken up or sensitive to noise, it's just something to be aware of. Also, being on the ground floor, we did encounter a few spiders, but this is pretty standard fare for Seattle.