Verbatim/MCC media is made in several different plants using Mitsubishi's chemical formulas and under their supervision. The official claim is that this results in a uniforrm high quality. Reports on Internet forums such as cdfreaks disagree, and say that the manufacturing quality of the disc (which greatly affects its longevity) varies noticeably according to which plant manufactured the disc.
So for example, the Made In Taiwan discs are made at a CMC plant. They might be using Mitsu's dyes and processes, but it's fundamentally the same CMC plant that produces the CMC DVDs - and CMC DVDs are pretty much the bottom of the known brands, right above the names nobody even recognizes. Not surprisingly, the Verbatim MIT discs have the widest variance in quality, and the most defects. Verbatim discs made in Singapore or India are more consistent and more consistently higher quality.
If you are looking for a consistently high quality DVD, buy Taiyo Yuden from a reputable online store.
Verbatim non-MIT would also be a high quality DVD, but are hard to find retail. Verbatim MIT are a crapshoot. I would not buy them thinking you're getting a high quality disc, for important data or archiving. But I would buy them as a cheap disc that's probably a lot better than the other cheap discs. Certainly that would be an appropriate way to think about them at this price. $15 for 50 is a good price for cheap discs.
Also be careful if you have an older DVD burner that does not support 16x burning. The media will probably still work in your drive, but a lot of 16x media does not burn as well (burn quality, and/or longevity) at lower speed - that is, most of it was very much designed for high speed burning and works best that way, and might not work as well burned slower.