Since it has been mentioned here on this forum before, I thought I should post some of my results with testing the TDK 16x white inkjet printable media, often sold at Costco on a buy one get one free sale (~$45 CAD for 200 discs).
So far, I've burned 2 discs, and both have made me believe my initial thoughts on them were correct. This media is low grade stuff, probably B Grade or worse.
The first disc was burned in the DVR-110 running firmware 1.37. I've attached a picture of the burn, and my test of it in my DW1640.