A lot of people are going to very unhappy when the warranty runs out on these units, there is a definite defect.
The other day on my 3rd replacement unit while using the "nav" feature the unit "froze" lost all nav,uconnect (phone),and ipod connection all I had was Sirius and radio
It did not reset until I disconnected the battery for 10 mins I took pics of the display as it was crashing(ed)