In General the apartment is OK, German is nice and speaks English.
We stayed one month and we paid the rent + additionally for gas, electricity and water 160€. The location is good. the apartment is on the forth floor and the stairs can be challenging but we were leaving our stroller at the first floor. the internet connection was bad, but there are two WiFi spot. we used only one of the, maybe the other was better. I can say that the apartment is good and you can stay in it for a month without a problem.also sagrada familia is very close which I guess is nice.