I stayed here for one night in the old building. The building is really nice and full of nice details at least if looked from outside, almost like a small castle. Also the public areas inside create a nice, traditional and decorous atmosphere. The food in the restaurant was delicious. The location is perfect if you want to see the Imatrankoski rapids, which is located just next to the hotel (Note: the power company lets the rapids run free only 15 minutes per day in summer)
But the place was, however, far from perfect. The standard rooms in the old building are quite Spartan, and thus overpriced. The elevator door (the is only one elevator) is creaky. The spa, that is included in the room price, is located in the new building which is connected by a tunnel to the old one. Unfortunately the spa is nor really a spa, just a sauna with a couple of pools.
Anyway, I think this is the best hotel in Imatra, but mostly because of the historical value of the building....
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC