How many hours do you have on your set?
They "work" without the slides. The slides are used to age the pixels in the same manner that he did which allows you to achieve results most near what he did. That doesn't mean that the results will be bad on your set if you didn't use the slides, however I do think that allowing your set to "age" some will have different results too. I say this because there was noticeable improvement after even just one week of use. Having had several Pannys this year I saw the difference each time I received a new one. The new one didn't look as good as the one with a few weeks worth of hours on it.