Good hotel rooms, good location. Staff were great, food options excellent.
Some things to note:
1) The desk has a drawer underneath it which rubs on your legs when using it. Still better than not having one, but I wouldn't want to be working at the desk for more than an hour or so.
2) The blockout on the curtains isn't perfect - once the sun comes up, you may need an eye mask.
3) Despite being on the 37th floor, you can still hear the trams as they rumble past outside. Enough to wake you if you're a light sleeper.
4) It's very close to the central station, which is part of the attraction to staying here.
5) The 'old town' is a 45 minute walk away, but you can halve that if you use the trams or subway.
6) I stayed in a standard room, but it's worth noting it's not that accessible. The bathroom is fairly small and you need to step in and out of the bathtub in order to have a shower.
7) I wouldn't bother staying here if it's just for the view. Honestly, you get the best view in Warsaw by going up the Palace of Culture and Science for about $10.