Even though I haven't tested all the tools yet, everything I've seen so far is excellent! I upgraded from Tier 2 to 3 without hesitation.

For anyone still unsure about investing in Subscribr: This tool analyzes your channel (or another YouTuber's channel) based on content, writing style, and audience demographics. It shows you what's working well and helps you continue developing your style. It generates several video topics that you can create as drafts with the click of a button. You can then modify everything: the length, references, and refine the content using the provided questions. All of this is currently free. The entire brainstorming process is also free, and there's so much more that makes scriptwriting truly enjoyable!

And the generated script reads just like the others. It's incredibly good.