That burn looks great. I actually ended up having to ‘revert’ back to BEFB on my 1640, because BSMB was unable to burn & verify my super-ultra-crappy PRINCO 1x DVD-R’s. I was, however, temporarily fooled into thinking the drive could produce good burns on the garbage PRINCO discs.
Burns on those discs look OK - quality scores in the 90’s - up until you start hitting the 4.0 gigabyte mark. Around 4.0 gigs into the disc, the PIE’s and PIF’s start increasing exponentially (not linearly), which leads to the appearance of POF’s. So, in my case, not burning a disc all the way to the end of the disc can certainly mask potential burn quality issues that show up only at the end of the disc.