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"Great buy, depite the difficult install, I have had no problems."
4.5 starson by DROrrPros: Easy to use/hack all of the function on the system work well. The hard drive is very cool.
Cons: Poor User Interface and can be frustrating to install. Takes a bit more no how to install some of the more advanced functions.
Summary: I have to disagree with the negative opinions. The problems people have mentioned seem are caused by an improper install.
The hardest part is installing the unit into you vehicle speed sensor and reverse light. If this is done incorrectly the navigation will not function properly. Also if you do not ground the right wires in the right places other problems can arise.
I hacked my unit along with a very experienced friend of mine who does installations for a living. Everything works as it should. The features on this unit are MY only complaint is the UI--it is ugly.