Long story short, I got this deck October of 2012 and it has been pretty good. I registered it with pioneer and received the information on the updates 4.6 and 5.1
I had a previous conversation with them prior to the update and they were telling me about some units not having Navteq. Needless to say I was confused reading which update I needed and did the 5.1 because it said if you don't have an iphone 5 you don't need it and I do have one so I thought that was the difference.. I tried the update and my radio is now useless!! I tried removing battery cables to reset and nothing!! I removed
