We stayed for four nights, and everything was easy. Voytek is friendly and welcoming without being intrusive. The space is immaculate, and exactly as described. We were comfortable and would gladly stay again.
We happen to be familiar with the area, and have close friends nearby, so we had easy access to a car for transportation. You certainly could use public transportation, but if you are planning a trip and expect to explore all of San Francisco, you should factor in a car. You are perched at one of the highest points in the City, so the hills are epic!