Avoid ASCO Car Hire and Value Car Rental. AVOID.
You have no insurance if you rent from them. I repeat, NO INSURANCE. A GPS device in your vehicle tracks your location and speed that they connect to a computer on the return of your vehicle. If you exceeded 60kph on a gravel road at any point in your trip, your insurance is completely VOID. After driving 5 hours on a gravel road you will exceed 60kph guaranteed. Imagine having no insurance while driving in Namibia. Enough said. You have been warned.