My tendency to be somewhat anti-urban park is because there is such a strong impulse in the US for urban parks to be zones of nothing like Boston 's Rose Kennedy Greenway apparently is. In theory they're for people to enjoy, but they're designed in such a way as to exclude them. They aren't really designed for people.
I haven't seen it, but I remember the process when the Big Dig was happening and thought that the 75% open space requirement was going to be a big mistake. Apparently it was.