Staying at Rocio's place was a pleasure. She's was a welcoming host and we chatted quite a bit in Spanish. The room didn't have a double bed as it's quite small, but it was absolutely quiet, can be darkened completely—we slept really well!
The city is about 30 minutes walking along the canal and there are busses available. The canal connects you first to the Guggenheim and then further down to the Casco Viejo, so navigation is super easy. We mostly walked in and took a bus back in the night.
If you're staying just a couple of days, Rocio's