To each their own. I like the idea of the DIY method for a few reasons:
* $3 gets you the equivalent of far more than two protectors
* If I mess up during application - no biggie. Wipe and repeat.
* No adhesive left after the fact... ever. The vinyl doesn't need any adhesive to stick. Once the protector is messed up, ditch it and cleanup of the screen should be minimal to none.
Certainly there are advantages to a low-adhesive commercial protector. I just don't like some of the disadvantages. I'll be trying it once I get a Nook Tablet.