Chrome is generally my browser of choice.
I do have some issues with certain pages, mostly some javascript and things that don't function correctly - but this is mostly because I'm using the nightly builds (currently v2.0.160.0) and not the general release build.
There are a couple nagging issues I have with it - unlike Saz, I actually don't like the bookmark management. It's workable and gotten better since the initial release, but I still would like to see something a little more robust. I also don't like how it closes the whole app when you close the last tab.
While I miss some extentions that I've used in firefox (like the EXIF viewer plugin), none of them were critical to my browsing experience - it will be nice once the gears stuff gets rolling though to see what people can do to extend the browser.
now, if only they would release a stable macOS and *nix version..
edit:
Incidentally, for those that want to live a little more on the edge and work on the 2.0 pre-beta as well, instructions for moving to the development channel builds are
here.
Release notes for changes in the 2.0 side are
here