Hmm, interesting design, yet much confusing. Just look at all those shapes and lines both in the exterior and the interior!
Interior. As many pointed out, there are many buttons in there. A german car with triple as much features would have only 5-10 buttons (apart from the I-drive-MMI-Command knob

). This type of steering wheel is present in the C4, too. I can't find the idea behind it. The Citroen officials say that this is this way, so that the airbag should be always in the right position. I thought that driver's airbag was circular
Exterior. The front is quite nice compared to the Laguna, the main competitor alongside with the 407. I don't like the rear though as well as the window line on the rear doors. It could be much better. It seems that the french designers don't spend much time to design their cars...