I was having a problem with this extension after I installed it. I opened a trouble ticket with CW and got a quick response. They have a very good trouble ticket system which tracks the issue through the entire troubleshooting process. They were quick to respond and quickly resolved the problem. It was a pleasure to work with them - nice to have competent support with someone who is interested in solving my problem quickly.
Now that you know they provide excellent support - more about the product. It meets my needs and does exactly what I wanted - the canonical URL's are a must and it is a core part of this product. The user interface is easy to work with and well thought out.
Both the product and the support rate as excellent with me.