Victor's guesthouse is wonderful. The photos are a true representation of the place. It really has everything you need. The kitchen is well equipped, if you want to cook at home. There is a water kettle and tea, a coffee maker and coffee ready for you to use. The backyard is beautiful. Having coffee in the morning or a snack in the evening before sunset is a highlight. The washer and dryer are also a big plus.
The location is great as well. It's just a 10 minute walk from BART train (SF, Berkeley), a few minutes away from nice restaurants on 40th and 10-15 minutes from the heart of Temescal (restaurants, shops, etc.). When you're in Oakland, you know that at night it can be sketchy, just because nobody is walking outside, but I walked from Telegraph to the apartment and it was always fine.
Victor is an excellent host. I only contacted him once as everything else was very well described (in his messages and in the info docs inside the studio).
I totally recommend Victor's guesthouse. I would definitely stay there again.