The lingering issue I have with that is that at first glance you see some cool routes, but then you get there and realize it was clearly a route for mountainbikers. I commute via track bike, which couldn't be any more ill-suited for the terrain. Given that my bike and style of riding is more suited for flat smooth pavement, I generally just ride with traffic as the routes are better maintained and it is easier to know when there is a pothole ahead.