We made a same day booking at Juan's apartment in Valencia. Juan's communication was excellent and check-in was extremely easy.
The apartment was very clean and had all modern amenities. The aircon was a big help in the heat. The metro is located very nearby and from there it's 2 stops to the old town.
Juan was an excellent host and gave us some great recommendations of places to visit.
The place is perfect for 4-5 people (or 6 people of you are very close friends).
All in all, a fantastic stay and I would return if visiting Valencia again.