I spent an excellent week in Guillermos apartment. The room has all you need and the bed is comfortable. It is also a great plus that there is a bathroom reserved for the room (there are two in apartment). I could use all the facilities of the apartment (washing machine, kitchen, balcony etc.) and it felt like staying in a good friends apartment.

Guillermo is a really nice guy and he knows the neighborhood so he can give a lot of advice on restaurants etc. The Rusafa neighborhood has tons of good and cheap restaurants and it has an autentic feel to it. It is also easy to get to the old city center by bus or walking (about 15-20 minutes)
Guillermos place is highly recommended.