Over the years that I've been using airbnb, I've concluded that there are two types of hosts: ones who use part of their own house or a second home to accommodate guests and do their best to make the place comfortable and to represent their hometown well, and others who buy properties in touristy locations and put in minimal investments in order to extract as much profit from the operation as possible. Unfortunately, this airbnb belongs to the latter category of 'host'.
After climbing the 4 flights of steep stairs (I'd advise that you do not even attempt to do this with a heavy suitcase), you will be greeted by a worn-out carpet with splotches of stains, a motley collection of furnishings that were obviously picked up from a second-hand store or perhaps even the dump, windows that cannot open to let any fresh air in, 3 space heaters out of which we could only get one to work, a shower stall surrounded by black mold and red mildew, and small pieces of already used soap left by the dirty sink. There is indeed a pull-out couch in the living room, but the mattress is so thin and the frame bulges in the middle, that it is painful to use it. The location itself is fabulous and a thorough cleaning and an investment in basic, but usable furniture would make this a great place to stay. As it is, I would have preferred to spend a bit more and get a decent accommodation. I am leaving this honest review so that other people do not make the same mistake and have a less than ideal visit to Edinburg.