My mother and I had a wonderful stay here. We checked in on the 17th of December for the Christmas markets and stayed for three nights. The staff were all so friendly and very helpful. We'd booked a Business Class room, for a spot of luxury, but on arrival they advised us that there were no Business Class rooms available, but hoped we would be satisfied with a Junior Suite instead. Erm... yes please! On the second morning they were decorating the HEAT restaurant, so there was a minor delay in seating us for breakfast. We weren't too bothered about this, but during our meal a member of staff came around with a tray containing glasses of champagne, by way of an apology. Such a lovely touch, which was appreciated! We also used the hotel spa, which was lovely! There's a bar in the spa too, so I had a drink there while my mother had her treatment. Perfectly located for Mitte and if you go for the Christmas markets it's just over the road from my favourite Christmas market. Will definitely be staying her again at some point in the future!

I've never spent so much time fixated on the interior of a hotel. I made sure I got a room facing the aquarium. This was a real treat. Such a fantastic and surreal view from the room!
Hotel staff were very professional and courteous, probably some of the best services I've received in a hotel. Wouldn't hesitate to stay here again.

Very interesting hotel - the huge Aquarium in the lobby is an eye cacher! Stylish location, inspired modern design, friendly staff with an helpful and well informed concierge. Didn't try the breakfast. We stayed three times in Mitte last year but Radisson Blu is still top of the list. And the view from the room - watching the fishes .... is something!

The rooms at this hotel are really nice with a very comfortable bed. They have a really cool aquarium which adds an edge to the hotel. The standard on the room service food is really good, and service level pretty good (for germany at least). I have a Carlson Club gold card, and they do not seem to give you anything extra. I have stayed here 4 times now, and never got anything (no upgrade, no breakfast included etc etc). However, it is a very nice hotel, and I will continue to stay here as it is good value for money.