I've been using it since the beta and i have to say since its finalized release it is the only browser on all my systems. Yeah sure Firefox 4 supports GPU acceleration as well and is available on XP, but IT IS NOT faster then IE9 and it still uses the most memory compared to Chrome and IE9.
IE9 is simply faster and I haven't came across a single issue or a website that isn't compatibile with it.
Nice going Microsoft
