inputs.text: great unit audio sound horrible nav - unit 4 years 2 one vehicle absolutely love sound no problehems part beef comes nav systehem maps old not really find looking maps not updateable well honestly never put updates tried years look updates never found even went alpine site not got one update first got unit none since nav systehem updated could actually find going unit would awesome something looking around take straight looking new roads establishments forget unit tends lock push many buttons back back fast selecting things make sure take time buy unit buy sound quality not nav systehem bought mine sound quality not nav systehem give 3 stars two star minus comes nav systehem not worth money really wanting nav