The hotel is conveniently situated near the Prater station (2 underground lines, overground, plus trams).
The hotel changed our rooms due to a leak in the adjacent room. The first room was sufficiently comfortable, the upgrade even more so. The hotel staff were helpful.
Breakfasts were reasonable priced (although one morning the coffee machine failed).
Near the end of our stay, the shower gel ran out and was not replaced for two days. Eventually I had to extract the bottle and leave it prominently on the side - it was changed then.