Been there, tried that.  Sometimes I reach into the kids' college funds and pay for the product myself. Many times, the product arrives in my mailbox and I get to try it for free. 

I never return products unless its a car loan and well, then it really is a test drive.  Whether I pay for the product or get it for free, these reviews are unbiased. 

Lenscrafters - <a href="http://www.veepveep.com/test-drives/eyes-wide-open/">Eyes Wide Open</a>

HP - <a href="http://www.veepveep.com/test-drives/hp-wireless-photosmart-c6380-all-in-one-printer/">Wireless Photosmart C6380 all in one printer</a>