This is NOT a good choice for a long-term stay. I rented a room here for a month, and would not book again.
It is basically a hostel. 5 rooms on my floor, sharing 2 bathrooms. Some of the rooms contain bunks for 4 people, so its unclear how many people you will be sharing a bathroom with. But, with a month of experience, I can assure you that the bathroom will look like a warzone most of the time. Housekeeping comes by every day and cleans it, but depending who the other guests are, it could be awful again within hours. Some guest literally peed on the floor instead of in the toilet one day.
But that's a minor complaint. There is construction going on in the building (June 2018). This means that 9am - 6pm, there will be a lot of noise. It also means the electricity, internet, and water are off without notice. For someone staying a month, and needing to work sometimes, this is completely unacceptable. There is no warning for these outages, and several times I was in the middle of working when the electricity cut, for 4-8 hours at a time. The internet was spotty for some of my stay, sometimes not working for an entire day. I contacted Maria twice about this via Airbnb, and never received an answer. The woman who let me in to the building (Joanna) answered Whatsapp messages and had it taken care of.
The wall between your room and the hallway is thin. You will not hear your neighbors when they are in their rooms, but definitely when they are in the halls. Most of the time this was ok, but there were sometimes groups of people staying that were out partying all night and would come barreling in at 4 in the morning, waking up everyone. You are at the mercy of the groups of people that stay up chatting in the common area.
My room was comfortable, I don't have anything negative to say on that front. But this is clearly a case where someone bought a building and is running a hostel, which is not what I look for when I book through Airbnb.