I had an incredible experience at Casa Del Sol. My room was fantastic. Well stocked, clean, good A/C, nice bathroom. It's located in a really fantastic spot, just outside of the tourist hub. You feel like you are really living among locals. I did most of my sightseeing by foot, and Emmanuel (the host) gave me tons of recommendations and tips on how to get around using taxis and public transit. Emmanuel was also extremely responsive if I ever needed him for anything.
I did this trip solo, but I plan on returning to Casa Del Sol one day with my wife. Can't say enough good things about this spot.