We love to do home exchanges and have done them in many countries. We do this through www.homelink-usa.com and have found it to be a great way to travel. Imagine what a hotel in SF would cost for two plus weeks! Instead, we were in a private apartment on Taylor Street in exclusive Nob Hill, with a bedroom, living room, dining room, and stocked kitchen so that we could have breakfast and other casual meals at home, another terrific savings.
This was our third straight year staying in this particular home, while the owner was in our place in Nice, France. My daughter lives in SF, so it's great to have a place to stay near her, but not "on top" of her. Two weeks is too long to stay with ANYONE!
We highly recommend exchanging!
From journal Two Weeks in San Francisco