One thing to keep in mind if you take car service is that the Millenium is right in the midst of all the track being by all the World Trade Center stuff. I mention this since I happened to order an Uber within a block of the front entrance of the Millenium a few weeks ago and even though the car was just a few blocks away to the east, it took 8-10 minutes for it to get there. I had previously only had car service from the Conrad two long blocks to the west which is right off West so cars can zip in and out a lot faster.