While I consider Polyfiber to be the benchmark by which all other covering systems can be measured, my project came with a big roll of Oratex. A plane expertly covered in the traditional systems is a thing of beauty, and if you're used to looking at museum quality planes the Oratex won't look pretty (up close anyway).
But it's tough material and it is hands down the lightest covering system out there, with a lot less variation from plane to plane (doesn't depend on how many coats of goo the user applies).
Regarding the cost of Oratex, I don't need to buy a spray booth, HVLP setup, respirator, Tyvek suits, etc. I don't even have the space to set up one of those inflatable spray booths, so I would need to rent space somewhere to do it. I think if you're starting from ground zero I don't know that it is more expensive.
Beyond the appearance up close (like reading glasses distance), the detractors of Oratex seem to have experience with the other covering systems and are disappointed when the same techniques don't work.