My download was fast. I had used RC3 before and it still had bugs, such as spell checker wasn't finding misspelled words and such... Overall, it's ok, but I like FF2 better. Never had a problem with FF2. I don't like the added features when typing in something, and they unorganize suggestions of stuff that you have typed in (such as in the Google search bar) so they are no longer alphabetized, so you have to go searching if you don't want to type it all in... I'll try it out for a few days, but I haven't seen anything better about it so far. Seems just as fast as FF2.