The air conditioner was either faulty, or completely ineffective. Not really a problem when temperatures are moderate, and you get fans to compensate. Also, be prepared to pay the city tax in cash, regardless of how you pay for your stay.
Never mind the rusty dark alleyway, once you get through the front door, a new world awaits. To be surprised to be checked in via Skype, it just works and is surprisingly efficient. Rooms are big, though simple, and provide all the usual comforts, including superb wi-fi connection. In-room breakfast is a definitive highlight - lack of dining space turned into a nice amenity. Best of all: the location is unbeatable, just next to Rialto, yet still not super busy with tourists.