Couple of observations
I have one, it's alright but the interface can be infuriating at times. e.g. the backspace is right next to "Done" on the qwerty screen, which in turn is right on top of "Send" on the create sms screen behind it. That, coupled with the non-repeating nature of the backspace key (holding it wipes your entire text) means more than a few half-written texts containing something you'd changed your mid about saying ends up getting sent.
Also the accelerometer is crap, but I've yet to use one that isn't.
There's also a few weird eccenticities, like the qwerty keypad not having an ampersand (you have to revert to numpad for that).
The lack of a d-pad means positioning the cursor in text is difficult.
The browser won't render my local bus tracker web site, but the WAP version of the same site causes the phone to crash every time. Joy.
There's no option to lock the widget layout, or line them up, so they all end up half-dragged around the place. Annoying if you're borderline OCD about stuff like that. Also depending on your provider there's often no way to delete unwanted crap (like Yahoo! on O2) from the widgets bar.
All negative points, but just niggles really. On balance I like the phone - just. It's good if like me you rarely use your phone and want something with monumental battery life on a cheapskate contract. Speaking of which, the battery life is the #1 standout feature for me. I make on average 2 five minute calls a day and send half a dozen texts, don't use the MP3 player or anything, and I get 8 days out of it easy. On that front it's like having a Nokia 3210 again.
@Butt Futter: Who shat in your handbag Doris?