Yuka's place was lovely and has everything you need. We had a great time there and didn't need to contact the host for anything.
A couple of points to think about if you want to stay here:
The bathroom is a bit on the small side, particularly if you're tall, and the closest JR or Tokyo Metro station is 20-30 mins walk away (Hatagaya is not accessible with JR Pass or 24-72hr metro passes), so we ended up walking a bit more than we had hoped. Also, it's directly next to a busy road which is very noisy. You'll need earplugs, but don't worry, they're provided!