I've had no great success with a pack of Verbatim 16x DVD+R's (bought from Office Depot with the Intelliflix offer)
I can only conclude that Verbatim disc quality is very variable.
By contrast, the Office Depot branded 16x DVD+R discs I bought turn out to burn very well indeed with my Samsung burner, but indifferently in all the others.
So my conclusion is that unless you go for the real top quality MIJ stuff, it's a real lottery.
Just when I thought I could kick the DVD burner buying habit, I could not resist ordering a Pioneer 111 from Newegg - groan, more tests!!
KHypermedia 8x4x12 (BenQ 800 clone) B2L7 BenQ DW1655 BCIB BenQ DW1650 BCIC Samsung SH-S182M KC03 LG GSA-H22N 1:01 TDB Lite-On SHM-165H6S HS0E Pioneer DVR-111D 1.29