we just returned from a trip in Namibia and Okavango was definetely the worst aspect of this trip. The director is an unfriendly, nasty and dishonnest person. First, he cancelled via mail our insurance during our trip, because we hadnt asked him approvation of our itinerary, then upon our return, he basically "dissected" the cars in the only objective of finding any kind of scratch or any other detail that he could charge us with. Example: he charged 700 Euros for a very small scrach on the dashboard where we had set our GPS.
Look for another car hiring company!