Walls are indeed a bit too thin - noises and voices do come through, however the guests of this hotel seem to be rather quiet.
Breakfast if rather poor, two other hotels in Kazan have superior breakfast.
As usual for other hotels in Kazan (from my experience), the hotel tried to charged me more on check-out, than the price I have booked through Booking.com - though this time I did not have to call Booking.com support and the problem was dealt with immidiately without much negotiation. Do check your bill before paying though.
Completely new hotel with great facilities, clean, staff friendly.
Even though I had some trouble here (see what I didn't like), this is one of the best hotels in Kazan with great location in the heart of the city close to best bars, restaurants and sights.
Great fast Wi-Fi is free of charge (or included in the room price, depends on how you look at it ;) ).