PROS:
1) AMAZING LOCATION IN MADRID
2) OPERATING A/C
3) GREAT HOSTESS!
CONS:
1) Unfortunately, we experienced a very bad odor throughout the apartment during our stay so much so that we always let the windows open while gone and bought air-fresheners to attempt to mask the scent.
2) There could have been a slightly better job with the overall cleanliness of the apartment.
3) The bed was literally one of the most uncomfortable beds I have ever slept in, and my fiancee and I were in fear of it breaking.
4) Some basic toiletries such as hand-soap in the bathroom were missing so we used the dish soap that was in the kitchen area to replace it. Trash cans are also very very small.

Overall, we had a good stay in Madrid, but we were not too excited when returning back home unfortunately due to the few "Con" items mentioned above. The hostess was amazing however by being very responsive and accommodating to us, and this is literally one of the best locations in Madrid especially if you want to many of the wonderful restaurants, museums and parks in a good walking distance. Personally, I think that next time, I will spend a little more money to get a slightly bigger and hopefully more cleanly apartment. But for the price, it still would be an amazing value as long as the scent is removed and the bed is replaced.