 This hotel is rather strange compared to others in Vienna Issue no 1 Leonardo hotel does not have free wifi in the rooms that is absolutely unacceptable in the modern world Issue no 2 even when you buy paid wifi connection for 24 hrs it works very slow In addition their paid connection only works for two devices a day if you log into 2 devices in the morning you cannot use wifi on other devices in the course of the day Issue no 3 the hotel is located rather far from the center of Vienna 
No Positive