Just my opinion, but the only use I have found for mine is if traveling with others to keep in touch on the road (seldom) or if I get in a real traffic bottleneck I turn in on to see what's going on up ahead and possibly alter the route, again seldom.
John & Sharon, 2 Daughters, 2 Sons-in-law, 5 GK, 1GGK
Rat Terriers (Twiggy, Annie)
1997 HR Imp., 38CDS, 1 Slide
325 Cummins C8.3Mech., MD3060, EBw/Coast.Sw.,
Toad-2003 GMC Envoy 4X4, Excallibar TB, Pressure Pro TPMS, Henderson Mot. Ctrl. Units