The host, Jason, was available and helpful. I'd recommend him as a friend.
The room was fine. The bed is the most comfy airbnb bed I've had (out of 8 trips). You'll get woken up by the neighboring lumbar yard at 730ish AM, which was a good alarm clock.
The neighborhood has a big plus: great food options. And a big minus: it's dirty. Public transit is close.
I'll stay there again if I want to stay in Mission.