A $90 cover from Amazon isn't going to be custom-fitted to your car body. I strongly recommend a custom-fit cover. It won't flap so much in the wind (which beats up your paint), and will be lighter and more compact for storage.
It fits well and they come with straps for the bottom of the cover to tie each side together from the bottom. I have two and I am satisfied with them. It may not fit like a cocktail dress, but it's good enough for the girls I go with.
Also they are made for the Mopar A body, they aren't some generic zip lock bag