I think in many ways it feels like a more traditional spreadsheet, but I could see where it could also be a bit more difficult for some than Org tables.

All the cells and numbers are similar to that such as other spreadsheet programs like Excel (A1, B1… etc). Formulas are entered below at the bottom of the buffer using Emacs lisp. These will be hidden unless you widen the buffer. This could be a challenge for some compared to the syntax for Org tables. Although, if you are comfortable juggling all the parentheses in Excel formulas, Lisp should be similar in many ways.

Here is a good Outline.