100% recommended:
Location: close enough. Heather's house is about 20 m. walking to Union Station and 40 m. to the Mall (where all museums and monuments are). Don't miss breakfast at Big Bear Café (in the neighborhood's farmers market) on a Sunday morning.
House and room: everything is shiny clean, the bed is really comfortable, the room is cozy, and she provides you with all you need for your stay (shower products, towels, guides and maps). The shower is right next to the guest rooms, and is also very clean and clear. Like at home.
Host: nice and helpful. She received us when we arrived at night and gave us directions to bars and restaurants. You won't see her much, but you can come and go as you please, so it feels like a youth hostel, but a luxury one!