The apartment is simply beautiful and beautifully simple. Sebastian is the perfect host. She is also an artist and a magician - we had no sooner wished for one than an elegant kettle appeared out of the blue. We loved the neighbourhood - the climbs are challenging but they did get easier. We eat breakfasts mostly at an authentic neighbourhood cafe - Thinkers - on 20th and dinners at the busy restaurants at 18th. Chez Mamam is worth the wait. MUNI buses from Potrero - 19, 22, 48 - will get you anywhere you need to go.