I was staying just one night on a combo of points + cash.
The hotel is easy to reach from the train station/airport bus if you know where you are going--to and straight through the Kamppi shopping center/bus station and up the escalator at the back and the hotel is across the street. You can also walk uphill along the right/north side of the center to reach the hotel (and easy downhill back to station).
Extremely comfortable bed and pillows. No noise despite near elevator.
Wifi worked well.
Hot in room from sealed windows/open curtains that heated up the room. I closed the curtains and turned up the fan, which made it OK, but not cool, despite pleasant cool temp outside.
Breakfast selection good, but room not well laid out and it was unclear to people what tables were taken versus set up clean for new diners, so people wandered a lot through the area and congested the operation.
I was given a room in the "annex" meeting center, not in the tower pictured. The nice part of the room was the large bathroom with good bath/shower with corridor separating from bedroom, so if two staying together, there is separation for noise/privacy. Carpet was stained, but room was clean.
The bad part of the room was the bedroom layout. The bed filled the room with barely passage at foot next to odd cabinet that held tv on top, minibar, pants press, tea kettle, and even the iron in a drawer. Desk was wedged to the side and chair could only pull out 6 inches in front because chair hit the odd cabinet--should have had a desk with the opening on the right, not the left side of the desk. TV was directed only at bed. I tried to turn it and move the other chair and strange stool?table?, so I could sit in a chair and watch the news while drinking a cup of tea, but it was almost impossible because of the height of the TV versus the chair and then I was worried I would hit the TV on angle with my head when walking by and break the darn thing (or my head).
I managed for one night without breaking my head on the TV, banging my knees too many time on the desk, or spilling hot liquid from the kettle onto my head. However, I could not have stayed and worked in the room for more than one night.