The 2-pack at the price, great. Just right for music in the car and go. Speed is not outstanding, but I knew that in advance and is depending on the application ok. Both cards were running without errors in the test:
Warning: 7451 tested by 7452 MB. Ready, no error occurred. You can delete the test files * .h2w now or to taste check again. Write rate: 11.2 MB / s Read rate: 19.3 MB / s H2testw v1.4