CMC burns very well in Benq drives! There is no reason to avoid them if you have a burner that supports CMC properly. Contrary to popular belief, CMC discs are not crap (at least not nowadays), but they are still poorly supported in a number of firmwares and can lead to coasters with these. Thus the continued bad reputation, though it's not really justified.
I get very good burns with most CMC media in my NEC and Benq drives, but my Pioneer 109 makes coasters out of them. Nothing to do with the inherent quality of the burner or the media, it's just a firmware support issue.
The scan is from a very cheap CMC source, Datasafe printable. You can see that even under a so-so brand, and despite the high scanning speed (12X), they do well (considering the brand, I was myself quite surprised ). Burnt @12X with SB ON for known media.