Full user review
"One of the few toolbars that actually doesn't suck."
Increased control over IE9's navigation,
Adblock, and you can also get a seperate optional TPL file for complete adblock in IE9, which is how I first learned of quero, and snazzy theming options that while not complete, supplement a few tastes.
I have some feature requests, but there are not too many cons about this, it's a toolbar that actually serves a purpose, not just a search engine advertisement because it sports a wide number of search engines.
The abillity to add extra buttons, like weather, simular to bing toolbar would be nice, but it's already a deal breaker if you are looking for a addon that gives you more control over IE9, and gives you an adblocker/flash blocker this might be the toolbar for you.