Depends on what you want to cover (laughing ;D ) the roll cage with and what type of roll cage Family, 1/2 body cage etc...
Some have better fabric and stitching. Difficult to tell who has what from a web site and you might want to ask about what type of fabrics are used and do your research from there on the better fabrics. I prefer Herculie fabric, very strong and sunlight resistant, but not water proof like a pair of bird-wells only resistant like a one piece wrap on if you get the pun.
I'm going to have a second one done by a local reupholster shop, they custom fit theres and seem to be worth the money, less the shipping not to mention a guarantee-