IMHO there r more criterias can be added in e.g 0 V' z' m M# s$ ?* c# }* `- speed of navigation system, _# p q) B' ~+ K; N5 ]! a5 N
- ease of use ) Q) {, a- q- P0 H9 U' l1 B; M- UI <-- quite important for a good user friendly interface5 [: U( Z! Q& b& ^; ^5 Y1 a