The local dealership had demo days on Indians and the Polaris Slingshot a couple months ago. I took the Slingshot out for about an hour. You can get them with a roof that flips up to open like a T-Top. To me it is a full sized Malibu Go Cart with three wheels that you ride on the track, except you can drive it on the street. You climb down into it, so it is very tight fit to get into. It's just like a modern car inside, with a dash, gauges, and stereo. It has a steering wheel, turn signal stalk, three pedals on the floor because it has a car's 5-Speed manual transmission with the standard H-pattern, and a car 4-clyinder motor. When you "drive" it, not ride it, it reminds you of being in a Miata, except it actual goes fast. :teeth
It's big, and just as long as a car, nothing like being on a small motorcycle. It has a short windshield, but no side windows. I think it has heat controls though, but it isn't something you would want to drive around in the winter or a very rainy day. There is zero storage unless you are driving alone. Then you can fill the passenger seat with your groceries from Safeway. They do sell a matching trailer if you want to drag it around so you have a rolling trunk. It cost $22,000 for the basic vehicle, but if you want the backup cameras and bluetooth stereo, it is around $32k. You can buy a couple of used Miata's for less than that money. One setup for the track, and one to drive to work, but they won't have the acceleration and speed of the Slingshot. It it pretty quick.
You can drive it without a helmet in Illinois, but some States you have to wear a helmet. A helmet would be a deal killer for me if I owned a Slingshot.