Making slides is a task almost nobody enjoys and a great deal of time goes into it. Not the thinking, which is the valuable part, but the mechanical work of laying out bullet points, resizing images, aligning boxes and making twenty slides look like they belong together. Gamma automates that layer, and for that specific purpose it works. The help material teaches you to use it competently in about an hour, which is roughly the right amount of documentation for what the product does.
The outline workflow is the most important thing in the help centre and I would push people towards it harder than the documentation does. Generating a deck from a one line prompt produces something structurally plausible and substantively hollow, because the model is inventing both the structure and the content from almost nothing. Providing your own outline, with your actual points in your actual order, and letting the tool handle layout and expansion, produces something far closer to useful. That distinction is the difference between the tool being a novelty and being genuinely helpful, and the guides mention it without emphasising it enough.
The editing documentation is decent, which matters because you will always edit. Changing layouts, adjusting themes, replacing images and restructuring sections are all covered clearly. Anyone who has fought with a tool that generates something almost right and then makes it difficult to fix will appreciate that this part is not an afterthought. The free tier is genuinely sufficient to evaluate whether this fits your work.
You can build several real decks before hitting limits, which is enough to form a judgement, and I would rather a generous trial than a demo that shows you nothing about how the tool behaves on your actual material. The substantive weakness is not really the documentation's fault and it dominates the experience. Generated content is structurally competent and empty. You get slides with headings, sensible bullet counts and reasonable flow, saying almost nothing specific.
That is inevitable, because the tool does not know your data, your argument or your audience. The problem is that the output looks finished, and looking finished is dangerous. People present decks assembled this way without adding the substance, and the audience notices immediately, because a deck full of generic statements is worse than a rough one containing real information. The design house style is recognisable.
Decks made with this tool look like decks made with this tool, and as adoption grows that becomes more noticeable. The customisation options genuinely help and the underlying aesthetic persists. For internal use nobody cares. For anything client facing or brand sensitive, that sameness is a real consideration and the help material naturally does not raise it.
This is product training with nothing transferable. You learn this tool's interface and nothing about presentation design, structuring an argument, or how generative models behave. That is the correct scope for a help centre and it does mean time spent here builds no capability beyond this product. The guidance on editing generated output is where I would most like more.
Not the mechanics of editing, which are covered, but the judgement of what to change. Which generated statements are placeholders that need replacing with real specifics? Where has the tool invented a claim you should not make? What structure did it impose that does not suit your argument? Every generated deck needs that pass and none of the material tells you how to do it. Where this fits honestly is as a first draft accelerator. It gets you from a blank page to a structured starting point in minutes, and it does not do the thinking.
Used that way, it saves real time. Used as a deck generator whose output you present unchanged, it produces the polished emptiness that everyone can now recognise. Three point five for help material that teaches a useful tool clearly and quickly, supporting the mechanical part of the job well while saying nothing about the editorial work that determines whether the result is worth presenting.