I voted satisfied as in general it just works and is fast which coming from a windows mobile phone previously is great, however I do have a few annoyances:
Lack of profiles: I need loud, silent and a bedside mode, which is currently not possible.
Flight mode: This works well, but whenever I turn it off, it always fails to turn wifi back on, which is hugely annoying
Inability to add shortcuts to the home screen for say turn wifi/3g on/off
Itunes purchases: i regularly lose songs that I purchased on the iphone when they mysteriously disappear when I next connect to itunes, despite it being set to manual manage.
Being unable to run applications in the background, I'd got very used to always being signed into MSN on WM smartphones.
The inability to charge from old firewire ipod chargers is an irritant as i'd built up quite a collection of firewire chargers which have all now had to be replaced.