With our 7 foot garage opening, I had to go with the OEM shorter antenna for $30.00. I talked to Shark Fin a couple months ago and he said regular radio AM & FM might not reach as far with the Shark. The shorter OEM antenna is not not very noticeable, IMO, and we use only AM and FM radio. I might have more confidence too, that satellite navigation receiving might be better living so far north. All the satellites circle the FL, southern region, from what I understand.
For me, the added expense for the Shark, with possible reduced local station radio performance, it was not worth it. It was nice the rep was up front with local performance. My 2 cents.