Swedish Thule does not whistle or sing, but it does dance for sure!
They do not even increase the fuel use much.
I have owned a few of those with various add ons. Swedish quality.
Off topicish question but since there are people of various nationalities here someone might know: How is Thule pronounced? Most people in the UK say thoole or thewal to rhyme with tool. The Americans I've heard say toolay but it seems like it would be Toolah in Swedish. It's always bugged me.