It doesn't work, causes more delays then it relieves, or other such unforseen things (in regards to the tracks downtown).

Just to note, I'm 100% rooting for it to succeed though! I might be one of the future riders if I can ever find a house I don't see as an outright rip off these days. The Milwaukee area (with or without a Wal-Mart - I might need it though to offset these artifically inflated house prices from the UGB) is starting to look somewhat interesting in the next few years.