Joined: Jan 2008
Posts: 23,645
Likes: 1,109
From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
Any bicycle GPS product is going to be mediocre or worse in a car IMHO. You can get a really nice Garmin wide screen auto unit pretty cheap, so I would go with two units. There are some great reviews on line of both the 705 and the 500. I struggle with the same decision.