It's been out for years, but I've stubbornly refused to try Google Chrome until now. I love Firefox. I even helped write a book about it. But technology moves on and newer products come out, and as a geek I should make the effort to test them if I can. So far my experience has been favorable. Chrome imported all of my bookmarks and saved logins, so I don't even have to retype passwords in the new browser. It does load faster than Firefox. Chrome also uses less RAM than Firefox, but that's not a major selling point for me since I have 4 GB on my MacBook Pro and I don't usually run low on memory.
I'm going to continue using Chrome on one of my PCs at work (which only has 1.5 GB of RAM) the rest of the week and see if I notice any other benefits or drawbacks. I don't think I'm prepared to leave Firefox behind, especially with version 4.0 coming soon. But I'm open to experimentation.