Stress and anger

A Navi should be easy to use and reliable and lead to "normal routes" in a timely manner to your destination. The registration and the first update I could finally make successful with large amount of time. A reasonable description is missing.
I have the device now for a good quarter. As a casual user I need it rarely. The longer journeys where I took it, were more than disappointing. I can only agree with the reviewers who complained that it is passed through each "horse town" and partly unpaved roads, in my experience a bottomless impertinence. The annoying speeding bell is provided with zero tolerance and therefore counterproductive.
I wanted to look at a few days later on the PC, the routes and set goals. No chance. The Navi switched after pressing the note ("Agree") on the danger of operating in traffic just gone and had to move for nothing. Tested on two PCs and two different cables. That way I can currently make no fix that is guaranteed "lifetime".
In connected car, you can turn it on after all and serve. I wonder how you can bring something to the market !!!
The relatively low price is more than eaten up by high levels of stress and time spent by the unreasonable demands described above. At least, my experience with the device. I can not recommend to buy it with the best intentions.