We had to make a last-minute trip to Valencia for a single night. The apartment was perfect for our purposes. Quiet neighborhood despite being super central, great air conditioning, and the hosts were super quick to confirm our booking and to respond to any requests. Mattress and pillows were super comfy.
As other people have mentioned, the apartment lacked some essential things such as kitchen utensils. Cleanliness could've been better and the neighbors across the corridor were hooting and hollering in the stairwell at 3AM on a Monday, which was pretty annoying (but I expect that to be the exception rather than the norm).
All in all, this was pretty good value for the price if you are looking for a place to crash during the night - or to cool off during the hot hours of the day - while visiting Valencia.