This apartment is in a great, albeit noisy, location within walking distance (10-15 minutes) of several Metro lines and all of the Centro Historico and Alameda sites, as well as great restaurants. We loved opening the windows to let in the light and sounds of the city, although the apartment is at an intersection that had some traffic all day and night long. (The mosquitoes loved coming in and feasting on me all night too!)
While others mentioned how small the place is, we thought it was perfect for two people. The kitchen has everything you need, including a full sized refrigerator and freezer, as well as dishes and silverware. The bed was comfortable, and there were extra blankets if needed. The bathroom is a little cramped but functional. Note that there is very limited hot water for the shower, but, if you've ever been camping, just treat it like the campground shower, and you'll be fine! Also know that the bathroom and bedroom are separate rooms but do not have walls that go up to the ceiling. (The walls are probably 10-12 feet tall but just don't extend all the way up.)
Overall, the building is very unique with different types of design in the multiple floors. There is a rooftop deck that we finally found - there weren't any directions on how to access it, but we wandered around the building until we ended up by the penthouse and just kept climbing. We had too much to see around the city to spend much time at the apartment, but it would be a great spot to hang out if you do have the time. We also appreciated being able to drop off our luggage when our flight arrived at 7am.
We would definitely recommend this place if you're looking for a quirky, very centrally located apartment and don't mind street noise.