I had a very pleasant award stay here last week. I showed up really early (around 7 AM) fully expecting to get rejected, but no, my room was waiting for me and I was checked in in a jiffy. I got a faultless recently renovated room on the "Priority Club" level with water, chocolate and fruit waiting, and a free drink voucher for the bar. The heated indoor pool was nice but small; however, there's no gym of any kind in the hotel, the nearest is a public gym at the other end of the underground shopping mall.
The location is quite convenient, ~30 min away from the airport on the S8 (the lobby even has a flight departure monitor!) and 5 min by train to Marienplatz, but even on a snowy winter day I preferred the 20-min stroll. Quite a few simple restaurants nearby plus a supermarket in the basement mall.