Just found this review at CDRinfo. I assume that this drive is an 812s OEM drive with slightly different firmware. I was astonished because of the inferior KProbe results of this drive:
Also, unrecovered read errors occur - and my 812s had the same problems.
Note that the KProbe scans were made on an 811s. Scans of the same discs on the 812s would probably look much better!