I participated in a conference, and was accommodated in this hotel. It is modern, fancy, with a lot of glass, glitter and shiny floors. I had a huge room with a nice view towards two directions. The hotel is on the top of a shopping mall where you can find expensive stuff and nice restaurants. And the top floor bar/restaurant has absolutely wonderful view over Kazan. You might be asked to pay for 'a deposit' to get seated - the deposit will be deducted from your final bill, though. If you just want to have a drink, the deposit might be more than your eventual bill.
The 'hospitality manager' of the hotel was absolutely fabulous and made huge efforts to get tickets to the local hockey game - and was helpful in advising about transport. Reception was also helpful in anything we needed.
I would have rated this with 5 stars, but I don't actually like to stay in a shopping mall. And... the TV speakers were installed also in the bathroom - and TV set to switch on automatically whenever the key card was inserted into the slot.