See this: Bike heaven... or close.
Since you and few other Americans have seen this system... and you are no doubt basing your decisions on what you have encountered here in the US; I can understand your doubts. However, let me assure you that a well designed MUP system can be both fun to ride, and quite effective.
The issues of segregation that so many VC cyclists seem to get all excited about were quite the opposite in Oulu, where the bicycle had the favored route and the motor car was given the longer secondary route.
The MUP system in Oulu (I was assured it was like this all over Finland) is well beyond any typical "park type recreation" MUP you have ever encountered here in the US.