While I realize this is the first version of the Chrome browser available for Mac users, the lack of plugins and a bookmark manager make it a third browser for now. As much as I enjoy the user interface and speed, not having access to plugins for 1Password and Xmarks makes it difficult for me to use regularly. I know that as time passes, software developers will add functionality for the Chrome browser and it likely will move pass Firefox to become my second browser of choice.
In the meantime, I will continue to use Chrome for my basic web surfing needs. Even though I cannot recommend making it your primary browser, I do recommend downloading and trying it out to see if it will work for you.