Cold at 19F and very slick. I decided to take public transit at first, then walked a block from my house and realized I could bike at least part of the way. Took it slow and rode a mile from my house to the subway stop, then a mile from the subway to my office. I got to work on time, when otherwise I would have had to transfer twice (subway, subway, bus) and would have been late for sure. A good day for a folding bike