I've been using it for a few weeks now, and I'd just like to say this is an absolute world away from what I was using on my previous phone (a blackberry). The graphics are beautiful and clean, the user interface is so easy to use, it's really made a difference to my life - I love using it and therefore I actually get more done!
I've raised a handful of bugs and feature requests as separate threads - this is just the most significant things I've found myself wishing for over the last few weeks; but don't think I don't already love the app - it was well worth buying.