I am working in NYC this week and will probably not get to ride.. However my daughter is riding to work now... she says it is the quickest way to get to work. She rides through Central Park and up 5th St.
We decided that her safety issues were not up to date. No lights, no bells and a really old helmet. So we got everything updated, great helmet, new bell (law in NY) and I brought her and her husband a day light rear flasher. We also discussed proper shoes.
Safety is a huge issue in commuting especially in NYC where there are cars everywhere.