I installed IE 7 yesterday without much knowledge of the product, exept the obvious. The environment is clean and well setup. I especially like the fact you can start a new browser session (or "tab") within a single execution of IE. Really helps keep clutter to a minimum from multiple IE sessions on the taskbar. I also like the way the menus are setup in this version. More straightforward. As far as behind the scenes, I'm not a professional programmer, only a novice. However, the extra speed would be obvious to anyone with general computer skills. Better security such as a "Phishing Filter" is an excellent idea as well as improved Microsoft Malicious Software Removal Tool are included without compromising your privacy. I also like the fact a RSS Feed icon automatically displays when visiting PHP BBS sites, such as MyOpenForum.com Setup took 30-40 minutes and was very painless. Only one restart was required, some final personal settings were saved and that was it. Windows XP SP2 is required for installation. Another note: Your copy of Windows will be verified via the internet before the installation can begin. Although I haven't been using this browser for very long, I'm supporting it... Thumbs up! More information: http://www.microsoft.com/windows/ie/default.mspx