Just be aware that these could potentially be the B-graded Verbatim that are sold in the UK under the no-name DataWrite brand too. Then again, it might be overproduction. Mitsubishi has changed some things around with their ramped multi-facility production.
Bad MCC media tends to have odd discolorations in the dye layer after being written, so turn them upside down and look for anything odd. Test about 5 of them too, see what the results are in a speed read test or a surface scan, using Nero CD-DVD Speed.
But it sounds like a good buy.