I drove one yesterday at a launch event. Not bad at all to drive, and the interior is pretty well built. Theone I drove was a 1.4 100PS Slam (the sporty one), which went OK, but could use the rumoured 140PS or VXR engines. However for most of the target market the launch engines should do just fine.
There are loads of custominisation options. I think there's a customiser on the Vauxhall website which is pretty cool.