Bit too early for a review?
Although I am always open to FF vs IE, I stick to IE for its basic compatibility and the "If its not broke dont fix it". At home I use FF much more but if FF was the default browser on a Windows installation for the next 5 years would we get more security updates

I do hate the updates and no doubt there but then again any product widely used gets targetted. Remember flash 5 years ago - i remember hardly ever seeing the word security, now within the last year or so I see a lot of updates and security flaws popping up. So to me I wouldnt mind ever using it at home but for work I would always choose IE. I will add though FF7 feels much better and I dont think its crashed once for me yet.