I found all siding by just talking to them as they were doing another job down the street. They provided a quote to me within a few days by e-mail (I like quotes by email), but then didn't respond to my affirmation that I wanted the job done by e-mail. I ended up having to call them.
The job was done well and, despite taking a little longer that expected as they were working on other projects, it looks good. I had to ask them to finish off a couple of details that should have been taken care of, but apart from that we were happy with the project.