I just worked out about 3/4 of my future commuting route, and it is an awesome ride. I get to to ride by canals and through a park. The rest is side streets with maximum speed limit of 25 mph. Some have speed limits less than that. Most of it is also a designated "bicyle route," so cars are used to bike traffic already.

I've spent several days working on this, both using the maps and riding the terrain. It's been worth the work. My ride tonight was incredibly pleasant.

...Next step is trying it during rush hour.