Well, I've had nothing but good and excellent results with Philips-, TDK- and Teon-branded CMC media, R01, F01, E01, AE1 and now Memorex-branded M01. Frankly, I have no idea where any of these would've got their supposedly mediocre reputation, but then I haven't used CMC DVD media prior to early summer of 2004.
According to my PNG scan collection, I've burned 182 CMC DVDs so far (59 AE1s, 15 E01s, 28 F01s, 4 M01s, 76 R01s), on BenQ and LG drives. I tend to trust CMC media because they've always had low to very low (and occasionally, un*freaking*believably low) error rates and the ones I've taken apart to gauge their strength were pretty well constructed... well glued together and requiring some effort to pull the layers apart. Additionally, old Philips-branded R01s burned in 2004 still scan as well as they did a year ago, while Philips-branded RICOHJPNR00s have grown dark spots in the dye and had to be re-recorded.
While I am sure there have been some duds released upon the world by the CMC factory, I haven't encountered any pathological cases, yet.
Now, some more scans to illustrate my points:
AE1, LG GSA-4163B at 8x Z-CLV (a wonder-burn with total PIF=4),
E01, BenQ DW1620 at 8x P-CAV,
F01, BenQ DW1620 at 8x P-CAV (patched firmware, using E01 strategy),
M01, LG GSA-4163b at 16x P-CAV,
R01, BenQ DW1620 at 8x P-CAV (patched firmware, using F01 strategy, WOPC disabled).