For comparison sake, I scanned a TY T02 media burned on the TS-H552U US06 that I had previously analyzed on my DW1620 B7V9. Running a quality scan at the same 8x speed, the TS-H552U reported better burn quality than the B7V9 on the same disc. Quality reports were as follows:
DRIVE - PIE / PIF indexes
DW1620: 2.96 / 0.04, 293 total PIF
TS-H552U: 2.68 / 0.02, 192 total PIF
Overall, the scores are very similar so the preliminary analysis appears to be that the TS-H552U is a legitimate if not optimistic quality scanner, though more limited in capabilities than the DW1620. Interestingly, despite the lower error rates of the TS-H552U scan, the final qscore was 95 vs. 97 on the BenQ analysis. The Samsung drive reported a much higher number of samples, similar to scanning with Liteon drives.