While it's a bit outside the center, Josef's place is very close to multiple transit stops - both Tram 6, U1, and others. Walkable from the center if you have time, at roughly an hour. Fairly quiet at night. Lots of very affordable local restaurants and kebab places.
The coffee was a nice touch. Kitchen is small, yet efficient, though a toaster or toaster-oven would be helpful.
Wifi is good, and reliable.