We didn't meet Isa, her friend waited for us at the apartment. He gave us map and recommend places to visit and eat. The apartment is good, but a little bit high floor if carrying suitcases, and there are many moths inside.
One thing to notice is that the door in the lobby is locked in early morning, we were locked inside on the day we check out, and had to ask the neighborhood for help. Luckily the neighborhood opened it for us, otherwise we would definitely miss the train.