(+) It is a big hotel with banquet halls. We booked a spacious room on the 9th floor with Danube view, which is nice any time of the day, be it a sunset or sunrise. Breakfast is excellent - a lot of choices, everyone can find something (even champagne).
(-) Unfortunately despite having 3 elevators, only one or two are in operation. We stayed on the upper floor and had to wait for quite some time to get down for breakdown in the morning. One day my wife asked twice to bring s bed sheet to our room and leave it on the bed, while we were absent. It did not happen and had to ask about it again in the evening. Parking costs 18 euro per day, which is somewhat pricey.