Admittedly I am only a few generation attempts in right now, so I will keep trying things out, but out of the three that I have done only one has been usable and I have blown 60% of my tier 2 250 monthly credits. The credits is my biggest gripe. There doesn't seem to be a way to see how many credits your prompt is going to take before you start. You just find out after the generation has started.
My primary use case will be animating graphs and while I have tried that yet animating a logo and trying to create a UGC video similar to one in their examples was a total bust.
Not saying don't buy the product, but definitely lower your expectations if you do. I am hopeful they will continue to improve on it, or at least make the user experience more understandable.