Disapointed…

I bought the pro version to process user input data with regex or “custom code”.

I cannot use it for the following reasons :

Regex and custom code will only work to define “acceptable” data, with no warning message.
I need them to detect specific data, with a warning message.

There is a mixup with error messages : I cannot differentiate the message for an front-side invalid entry (“text is too short” for example) and the message for server-side invalid data based on regex or custom code.

The “custom code” terminology seems very optimistic, as it is just a set of values that are accepted. As far as I know, there is no code, as such.

May work fine for standard form validation tough…