Location, location, location!!
Marisa's place was in such an incredible area of Valencia, I would highly recommend staying here if you have a chance. It is located in a very quiet nook, just around the corner from the Mercado Central and La Lonja, and a short walk to many of the historic sights you would likely visit when touring Valencia.
Marisa was so sweet and was a very kind host, providing a fantastic list of local suggestions and ideas. She was very easy to communicate with and even helped us coordinate a taxi service to the airport for our 6am flight.
The WiFi was very fast, in case you have to do any work during your stay, I noticed there weren't any problems streaming videoconferences on multiple devices at the same time. The Air Conditioning worked very well. We had it turned off to save energy while we were out and noticed even with 100+ degrees Fahrenheit/40 degrees Celcius days, the Air Conditioning cooled the place very quickly and efficiently for the evening when it was time to sleep.
Everything was very comfortable and the kitchen had everything you would need if you choose to stay in and cook a meal or two. The living space was also very comfortable and there was also a desk, in the event you need to do some work.
Pack on the lighter side as the stairs are quite narrow which is difficult with large or heavy luggage. Luckily it is only one floor up above street level. For the light sleepers: the bed had some creaks and cracks if you or your partner tend to toss and turn during the night. But overall, this was a great place in a great location, with a great host. I would not hesitate to stay here again if and when I return to Valencia!