We visited Radisson Blue in East Berlin with my husband in Summertime. What a great hotel. The biggest suprise was the worlds largest indoor fish tank (sylinder) which offered us romantic view from our room! The breakfast with sparkling wine was more than welcome on our holiday away of children. The sauna section downstairs very good. Service good, even though not all the staff spoke good English. Near to historic sights, a huge shopping center close by. Near to nice area with cafes etc. Train or taxi to Kudamm, Potsdamer etc costcs less than 10 euros. A tall TV Tower close by; had a typical German lunch in here.