It wouldn't be hard to make a product that works 90% of the time. The problem is making a product that is extremely reliable, working 99.99999% of the time. Whe

It wouldn't be hard to make a product that works 90% of the time. The problem is making a product that is extremely reliable, working 99.99999% of the time. When it comes to GPS car tracking, the system needs to work all the time, so I imagine getting those 5 9s is damn hard.