We really enjoyed the stay at Kristiinas place. The room was very cozy and cute and just like on the pictures. Also, we really liked the lovely kitchen with vintage and warm atmosphere and it was also very nice that there was Coffee and porridge available for the guests.
We stayed at the accomodation without a car as we rented that later on our trip. So the Bart Station that goes to San Francisco is just a 10 to 15 min walk by foot away and it takes around 20 min I think to get to Union Square in San Francisco. So public transfer is nearby. However, I want to point out that we didnt feel very save walking around the neighbourhood in the late afternoon or evening (esp. when it got dark). So I think for safety reasons or to feel more comfortable I would recommend to have a car during a stay. The Oakland old town and Center, the Port and the lake were also nice spots to visit. :)