This is just about as good as it will get if you visit Columbus. Josh's house is a stunning old place, very homey, and he keeps it immaculate. As a matter of fact, just about any little touch you'd want for any stay is completely thought of here.
I know this is a bit of gushing, but frankly, this is one of the nicest, best-kept, every little thing thought of places I've stayed at with Airbnb.
It's three miles to city center, which I walked on the first day. However, one of Columbus' great highlights is a 10 minute walk away -- the Franklin Park Botanical Gardens. This is a must see, with many stunning Chihuly pieces set among the plants and flowers.
Breakfast recommendation: walk to Bexley, the town next door, where is there is a landmark movie theater on the main strip. A block away is Cherbourg Bakery, which is outstanding with everything made fresh and gluten free.