I strongly recommend Frank's place, everything was impeccably clean and tidy, there were really soft sheets on good quality mattress, mineral water in the room and it was easy to park the car on the street.
The best part was chatting with Frank, he's simply adorable! He gave us hints on where to go in Valencia and, although the plan was just to spend the night and travel to Barcelona, we visited amazing places in Valencia and now feel like going back with more time.