Marta was very responsive with communication. No problems with check-in/check-out. The studio apartment was spacious but minimally furnished - bed was very lumpy, no microwave, gas stovetop needed a lighter which didn't work, TV had no reception. There were several flights of stairs to climb (no elevator) so people with mobility issues should take that into consideration. Even though there were 2 large windows, with no AC and only one fan, it still got pretty warm. Also, the tram track was very noisy with the windows opened.
Location-wise, it's right on the doorsteps of Chinatown. The main train station is about a 25-minute walk away and the Cathedral is about a 20-minute walk. Public transportation was easily accessible.