Nadine is a wonderful and kind host. She makes it clear right away that her house is yours and wants to make you comfortable. The pictures do not do the room justice, it is a lot bigger in person (especially compared to other Barcelona rooms). There is no AC (the listing says this) but she gives you 2 great fans in the room. The balcony is very nice as well. The wifi is not great and can be very spotty, so plan to have another way to get on the internet if possible.
The location of the apartment is good and bad. It is a 5 minute walk to La Rambla and really convenient to most of the major sights. However, it is in a bit of a dangerous part of town. My traveling partner got her phone taken right out of her hand as we were walking home. Upon reporting this to the police and showing them where we were staying, they informed us it was a bad area. Things like this can happen anywhere, so just be aware of your surroundings.
There is an elevator in the building (super rare for Europe) that makes getting your luggage to the room a lot easier. The only thing broken in the apartment is the shower head holder in the bathroom, so you have to hold it over your head while you shower.
Overall, Nadine is a wonderful host!