I have in my hands a Samsung Omnia Pro B7610... so if anybody is interested and wants to know anything specifically, please let me know and I'll do my best to answer.
First impressions, bearing in mind I've had it for about an hour so far...
The Good:
Screen is lovely and clear
The screen is a very decent size and resolution is as good as any other
Keyboard is very good and very usable, although lacks an 'OK' button
The Bad:
It's pretty big... a very similar footprint to an iPhone, but twice the thickness.
It's slow. Flicking between the multiple homescreens, menus etc has a noticeable lag. When scrolling through screens, up and down menus and other such movement on screen there is a delay and a jerky movement.
Samsung have hidden everything behind their own UI, right down to the Start Menu and Settings. Some of it makes sense and it certainly looks prettier, other things aren't as logical as WM.
I have it for two weeks so will no doubt change my opinion on some of this stuff as time progresses. But it certainly lacks any form of 'wow factor' and to be honest, I'm not sure what this phones unique selling point is that would make you chose it over the other WM phones on the market?
If you want to know anything though, post here and I'll do what I can
Rob