We stayed 2 nights at Renee's place. It was really clean and comfortable. You can reach the city centre and the main attractions with U3 and it takes around 20 minutes( it takes 2 minutes to walk to the metro station 'Ottakring'). There are several options to go grocery shopping, there are Billa, Spar, bakery, pharmacy nearby. Picking up the keys and finding the apartment were easy.
We liked the flat and the neighbourhood, definitely recommend if you are travelling on a budget.