I had a Cobra Classic 29 in my Winnebago. Moved the antenna from the ladder to a hood mount and saw better SWR. Removed it when I sold the Winnie and never even thought about installing it in the Forester.
Out west here, nobody uses them except off-roaders and they are switching to HAM. Had a sign in my rear window CH19 and .520 for HAM 2m. NO one ever called! Also have a Technician ticket for HAM and carry a Yaesu FT60r for use as a scanner.
2004 Winnebago Minnie 22e(went to a nice family Oct 3, 2015)
2016 Forester 2701DS (Aug 31, 2015)
2015 Camping 3 trips 6 nights
2016 Camping 9 trips 28 nights