On the whole I've been pretty impressed with the Orbit2, but I do have some issues with it.

I just don't think the build quality is very good. For example my SD card sticks out so the cover doesn't close properly.

The side buttons are spongey and unresponsive......

....and the front button panel seems plasticky.

Then there's spinny wheel. What was the point? It's rubbish. A good job it doubles as a dpad.

Why take away the HTC home plugin and add the cut down O2 plus stuff? That seems crazy to me.

The Touch dual ROMs contain a few superb software tweaks like the contacts A-Z panel thingy. Where are they?

Generally I think the device feels a less solid than the Kaiser or Touch or S730.

Bluetooth strength is poor. With my phone in my back pocket while walking to work when I use the green cross code (look left then right) my S9's cut out each time I look. I never saw this with the Touch or the Kaiser, or the S730. The volume seems low through the S9's too compared to the Touch and S730.

I've got a minor issue with the switching between 3G and GPRS. It seems to be a bit funny about it and drops my active sync connection occasionally. Again not something I saw with the Kaiser or S730.
I'll not put a

by this one as it would be unfair, but the week I've spent away from WM6.1 I've really missed its features. Come on O2, we need an early ROM upgrade!
Other than that I think the device is pretty sweet. On the plus side:

3G/HSDPA is FAST.

GPS is FAST.

Totally loving the OK button. It's the one thing the Touch really needs.

Excellent screen protector.

Device is generally fast overall. Quicker I think than the Kaiser, Marginally quicker than the 6.1 Touch.

I'm liking the extra memory capacity.