I ordered a CoverKing for my Viper and it didn't fit. The company had me double check the number on the cover, it was the right one supposedly for my car. They would not take my word that it didn't fit. I had to send them pictures of it stretched out tight on my car before they would authorize the return. The whole process took me about 3 weeks to get my money back. I think they sent me one for a convertible not a coupe.
They do make a nice cover, I have one on my Vette.