If you've ever seen a three-wheeled contraption like the Polaris Slingshot zoom past you in traffic, chances are you're at least a little bit curious to find out more about this unusual automobile.

I was reluctant to accept the loan. For months, Polaris had been emailing me, trying to figure out a good time to drop off their 2018 Slingshot SLR at my doorstep. I was certain I would hate it. How ...