Most of the local MUPs are pretty decent for getting around, but you really have to be prepared to slow down and pay close attention. I try to assume that children and joggers are going to step out in front of me and I'll generally delay a pass until I can get safely and clearly around. Now it does depend on the time of day - I commute via one and it's fine in the morning. There are a number of other cycling commuters, but I can generally maintain a decent pace pretty safely. Things slow down in the afternoon, and on a sunny Saturday or Sunday it's going to be very slow going!