I have an XDA mini S II
It's the mutts nuts.
I'd give it 9.5 out of ten, the missing half is because the touch screen writting setting always default to the little keyboard rathre than the one that I like to use each time the device is powered down, but that's more to do with windows than the device.
Also it could do with comming with a few more apps, but you can get most apps you need for free.
for instance, if you use the media player, the back light stays on, so I've had to find a new app for turning off the backlight to save batter when using it as a music player, (but his affects all windows phones!).