Here's a review of the Sheraton Warsaw from the 1997 edition of DK Publishing's Eyewitness Travel Guides: Warsaw.

"This is the city's most recently built deluxe hotel. Behind an impressive Postmodern facade, it has strikingly opulent interiors in an international style. An excellent location is combined with every amenity to make a stay more enjoyable, including a jazz bar that is renowned in Warsaw. The hotel is mainly geared to visiting VIPs and businesspeople. The even more luxurious 'Towers' section, which occupies the top floors, functions almost as a separate hotel, with superb suites and service."