Verified purchaser
Five Tacos from My experience
Point 1 - This product is easy to use and no much learning curve
P2 - The process of going from step to step is good and easy to execute while writing on some ideas
P3 - Prompt length can be increased a little to accomodate longer instruction, points, outline, pointers to include mandatorily in the book and so on. 6000 character is decent but can be extended at least upto 10,000, and best if it can accomodate and write based on 20000 character long prompt. As people like me can feed in the random ideas we have collcted over last 15 years and feed it to AI which can then take its own time to write and organize them. It will be best product then.
P3 - credit utilization is fair, writes decent amount of output using fair amount of credits. Higher models are bit more expensive (using 4x credit is not what i had expected. Using 2x credits for higher models would be fair)
P4 - it should allow us to choose the model to use. Chatgpt, or claude or gemini pro. which one we want to use.
P.s. i havent checked the output it threw to me based on my prompts. But will do it soon to see what it gives.
Ioannis_Youbooks
Dec 15, 2025Thank you for the review! On your points...
We do plan to increase the max prompt length allowed to something close to 10K from 6K.
The advanced model (4x mode) give sonly marginal benefits - in most cases, you won't be able to tell the difference.
On being able to choose the models - the problem honestly is the user confussion this would result to. Many users want youbooks to spit out the book they've always dreamt of writing. When this does not happen, sometimes they respond very emotionally. Allowing all users to choose the models (as we do in BYOK) would result to a much more complicated product, more ways to "go wrong", and more complicated pricing (credit-wise).
Users want to click on a button and get the book they always wanted - not the best book that can AI can write today for them. The last thing we want to do over support is having to explain to a user that the book did not follow the styling directions very well because they chose Gemini in X setting. That would be a disaster :-)