Well i have a mixed review/. The new features are great, the look of it is amazing, the interface in intuitive, basically it’s everything i ever wanted firefox to be without having to download 3rd party software… the one thing that made me uninstall and revert to 3 is that i depend heavily on msn messenger… and for some reason after having installed 4 i started having continuity problems in my conversation flows… if i started up a conversation the cursor would automatically appear in the dialog box as always…. once having sent the message however…. i had to go back and click to reactivate the cursor every time in order to be able to continue typing…. the second i went back to 3 the problem was fixed. So i guess what i’m saying is I LOVE 4… but i’m going to wait until they fix a couple of bugs before i reinstall and make it my default browser…. till then… firefox all the way.