I tried Acer iconia tab as a replacement for the Navigator — drove the route 2 thousand kilometers one way.
From pluses — awesome big screen, very easy to see cards, as well as a large selection of different navigation software
Of the minuses — without a co-driver is not very comfortable to hold 10" in hand and steer at the same time — I was lucky, rode together.
And the battery goes down very quickly, so wlucli it only the disputed points and when in an unfamiliar city went — there it is all the time kept enabled.
From Kazan to Elista in the end, the battery withstood 20 hours of pure journey with stops for a snack.
However in Volgograd 40 minutes it recharge