I switched to WordPress about a year ago and never had to contact customer support–because everything was intuitive and worked the way it was supposed to.
This week I had to contact customer support. It was easy. They have a built in chat feature. The person knew what they were doing. I got my answer quickly and was on my way!
WordPress runs over 75,000,000 websites. I think part of the reason they do isn’t just because the software is OpenSource and extensible. I think part of is that they have quality for the user built in at multiple levels–the good readers who enjoy this blog, and the guy who creates the content.