I don't condone downloading and installing random programs just to try them. That's a great way to expose your computer to security threats and performance issues--not to mention filling your computer with junk. But if something helps you get things done and improves your computing experience, then it's time to download. That said, I highly recommend downloading and installing Internet Explorer 7. I've used IE7 for about two months. It's great. I had some problems when I started; for example, I couldn't log into my online banking site. But those problems have been resolved.
Several people--including me--have written about IE7 and some of the reasons to use it. I've included links to some these articles at the bottom of this article. In addition, here a couple of the things I have liked about IE7 so far.
Here are some additional IE7 articles that are helpful and that I suggest reading.