Great place for a weekend but too small for longer: surely the best value for price in Vienna. It is perfectly located (3 min by foot to U Bahn train line 3 ; 15 min by foot from the Ring, lot of coffees and restaurants nearby).
Inside, it is like a hotel room: large space dedicated to the king size bed and a bathroom. Less space for storage. The kitchenette allows to boil some water, make coffee and eat ready-to-eat meals.
The check in / checkout is very convenient (through distance unlocker) and the communication with Katalin was easy.
During our stay, the neighborhood was very quiet.