My exhaustive review of these disks: Absolute sh*te.
3 for 3 coasters using both CloneDVD2 and Nero Recode (current version) with my BenQ1620. 2 bogged down at 50%, seemingly have a problem switching the layers. Did get a full burn with Nero but did not get past the FBI warning screen as confirmed in several other posts out there.
Thankfully only $12 wasted, not $30.