I've installed IE9 just today. I like it, for the most part. It will take a while to get used to the home and favorites being on the upper right side, instead of the upper left side, but I'll get used to it.
What I would really like to know is, how do I forward a page in my email client of choice? With IE8 and below, I could go to the menu bar, click on the Page item, and then select "Send Link by E-mail..." I don't see how to do that with IE9.