The Trifecta has a lifetime frame and a 10 warranty on the vinyl. Trifecta is a great cover and is the reason the Solid Fold was created.
Yes, the Solid Fold is rather thick, but if you think about it, it probably has to be that way. The only thing I wish Extang would change on it is the seal. The rubber seal is rather...short. I wish it were a bit more beefy. But, if they did that, the cover would appear to be even more "thick".
Here's some pics:
http://img.photobucket.com/albums/v4...SolidFold1.jpg
http://img.photobucket.com/albums/v4...SolidFold2.jpg
http://img.photobucket.com/albums/v4...SolidFold3.jpg
http://img.photobucket.com/albums/v4...SolidFold4.jpg