Best of all is the support. I had a minor problem so I went to the website and a little chat window popped up. My experience has been that chat support is usually worthless. Not in this case. I told the support person the problem I was having and he asked to see the site. He then told me exactly what settings to change and it's working perfectly now. It took about 5 minutes. You can't beat that! :)
This is just plain and simple a really well executed product. I highly recommend it. And the support is top notch as well.
I've been using this extension for about a year and a half and it works great.
I'm currently working on a website and I had one very minor, but strange issue, so I contacted Mike and he personal fixed it for me! I also inadvertently caused a conflict once, which was all my fault and Mike helped me fix that as well.
Definitely a great extension!