I was looking to buy some spreadsheet-based workflow for my personal and professional work. I jumped on this deal as soon as I saw it. Stackby is invaluable. It ticks most of the right boxes. After using it for 5 days, here is my honest review.

—> There is a steep learning curve, but after spending a week or two, you will find it easy to use. I'm not able to use LINK, but Rachit offered a demo to explain how it works. Hopefully, I will connect with him soon.
—> It is not just a replacement of Excel or G-Sheet, but much more than that. From an operational point of view, it makes life easy. Once you start using, Stackby will become part of your daily routine/todo.
—> You can customize the way you want. With 20+ column type, and flexible to move row/column, it is a breeze for users. Notwithstanding 1000s of rows, there is no sluggishness. Everything works in a second.
—> The support team is fabulous. I hope they will continue to do the same in the future.

Suggestions/Feedbacks/Cons:
(i) There aren't enough APIs. I need APIs like SendInBlue, NSE exchange, Zapier, etc. I hope they will add sooner than later.
(ii) Some improvement in UX, removal of occasional bugs, moving stacks in the dashboard, moving rows to different tables, etc. are desired.

Overall, I really like it, and I will give 5 Tacos. Go ahead, and buy. You won't regret it. It changes the way people use workflow.