Owners were very friendly and offered us some great advice (we arrived the day of one of the many festivals in Valencia and they kindly messaged us beforehand with their recommended highlights).
The main room is very spacious with a comfy king size bed and some lovely tiled floors. It is on the second floor at the back of the building so we didn't hear any noise at all from the street side, though because we were sleeping with the windows open (rather than using the air conditioning) we did hear tenants using stair well behind us returning home on our last night. Good wifi signal.
Apartment was in a brilliant location within old town of Valencia, with lots of small bike rental shops near by (we rented a bike for 4 hours and cycled along old river bed, past the new opera house/science museum to the beach). The bike shops also offer 24 hour rental and the shop next door offered to 'garage' the bikes overnight if needed.
Nearby is a small museum housing a number of religious floats (down road on left just before tower) and further along is CCC art gallery with a selection of modern art exhibitions/installations - both had free admission.