Jussi P.
Google
This consert hall is designed very well in terms of acoustics. I've tried every section of the hall and everywhere you can hear the music clearly, even in the top parts behind the orchestra. They have very spohisticated mic setup and amplifiers to take care of that.
The cafe is quick and cheap on intermissions, I've always had time to enjoy some soda and pastries.
The Helsingin Kaupunginorkesteri and Radion Sinfoniaorkesteri conserts are very cheap, starting from 10e per ticket and they play very well. I've found many new pieces of music from their concerts that probably would have never heard otherwise.
Free cloakroom service, free printed programmes, excellent service at every step on the way.