I am a N97 user.. N after upgradation 2 version 2.0, I cn say the experience is much better. most of the nagging issues are resolved.. here’s what is different.. the OS is snappier..
Operating multiple apps is smooth.. without hang ups.. few bugs such as copy paste, better integration of music player and long press to get nos.. was pretty annoying not to have it earlier... the best part is kinetic scrolling which makes the touch feel like a real touch now.. its quite fast and snappy.. here;s a video that demos the benefits after upgrade and steps to upgrade..