We enjoyed our stay at Oscar's place. Location is great: safe, subway station is like a block away, bodegas and restaurants close by. Unfortunately, suite 1 & 3 are by a red light; if you're a light sleeper, the cars/trucks and their music might disturb you at night. Choose suites 2 or 4 instead :)
Oscar was available via text/phone, nice and helpful. The place was clean and comfortable. Cleaning person regularly cleaned the common areas. As others said, there's only one bathroom for up to 8 people, so a lot (cleanliness, availability of common areas) depends on the other guests and your communication with them.