We booked one day before staying. Ashot was very helpful and flexibel as we didn't know when we would arrive exactly. Very uncomplicated setup, very clean and extremely good value for the price. Grocery store is across the street and the kitchen is fully equipped (Nespresso machine!). Public transport (the S1) is just around the corner and takes you to downtown (Marienplatz etc.) in less than 20 minutes. Can only recommend.