I don't have it, but my husband does. It didn't come with his car. He installed a unit in two different vehicles that he drives and another one on our boat.
He also has a small portable unit that he can bring inside of the house or take anywhere he wants music. He listens to music from the 50's and 60's.
He just removes a face plate and plugs it into a unit where he happens to be, I don't know what he pays for it. He's had it for years and pays for it annually.
If you get a subscription, you can also use it when you're not in your car if you buy a portable unit.