Regarding Cesar's apartment - it's in a great location and it does what it needs, we had no issues! The air conditioner seems a bit old and you feel it in your throat a bit for sure but great location and space with everything working well.
Regarding our experiences with Cesar, unfortunately not great, we had two bookings for his place and on one of them he told us if we were there at 9pm to get the key then great but a minute later and we would have to find somewhere else to spend the night, so that wasn't a great experience. He knew our flight landed around 8pm so it was touch and go. we said we would try...
...He then suggested that we should cancel as he couldn't get us the key ... however the other time we stayed there the key check in and check out was done with the 24 hour concierge, with that in mind the 9pm deadline was very fishy, especially on the eve of Carnaval. We felt really let down and it added a lot of stress and rebooking - wouldn't book again.