I'm doing a full review this Sunday, but, in a nutshell, it's a three-out-of-five.
Pros
-- It looks and feels great. Best slide-out keyboard in the market
-- It has some nice software touches, like its panels. Feels like an iPhone for grown-ups
-- It has loads of productivity software on it (Microsoft Office)
-- It's slim and easily fits in a pocket
-- It has a good battery life: it easily lasted a full day of multimedia and voice activity
-- Good connectivity, HSDPA, wi-fi, GPS
Cons
-- Its Microsoft Windows doesn't sit easily with the Sony Ericsson software: it's awkward to navigate, except when you're in panels format
-- The text, icons and external buttons are all tiny. You can re-set the on-screen items but they switch back sometimes. Too small to use without a stylus
-- The three inch screen is too narrow to properly display videos and photos -- they end up being the same size as on a bog-standard pre-pay mobile
Sony Ericsson says it won't be available as a network-subsidised model until February, when it will become available "on all networks". Right now, you can buy it sim-free online from a number of places: best price is probably Clove.co.uk at €575 (including delivery).