This looks so promising, but I must be doing something wrong - It's not fully functional, yet.
First, I want to confirm that I fully understanding where I should insert this script. Does this go in the Custom Code section in the Dashboard, under Header Code? Under Footer Code? I see the line and jquery script when I inspect the Published page, but the slider behavior doesn't seem to work, despite having replicated your implementation, verbatim.
Here's what's going on>>
a) Within the designer environment, the Slider is pulling in and overlaying all 7 CMS Records, stacking all the texts on top of one another. This does not appear to happen in your example tutorial, nor those of other's who've tried and shared their work here. I've tried playing with The Dynamic List Settings, alternating between setting limits on item display and keeping that unchecked, but that doesn't seem to affect the behavior. Any sense of what's going on?
b) Testing the slider on the published site, the text overlay issue mentioned above seems to resolve itself - ie it doesn't stack each slide on top of eachother. However, Clicking either left or right buttons makes the entire slide disappear, with no way to recover it without refreshing the page.
c) there are other issues with the placement of the navigation buttons, and the overall centeredness of the slider relative to the the page width that I'm struggling with, and I'd love any advice you might have after taking a look.
Please let me know what you find?
(Section in question) is Testimonials