Anyone using Stirling PDF? Worth it?

I'm considering running Stirling PDF. In a way, it's pretty niche: a tool for editing PDF files. On the other hand, when the need arises every now and then, for myself or those around me, it's always a bit of a pain to figure out how to do it right on Linux.

Stirling seems to be a decent solution for this.

However, seeing things like this in the docs is giving me pause :

Before configuring OAuth 2.0 SSO, ensure you have:

• Stirling PDF with login enabled (security.enableLogin: true)
• Valid license for Professional tier or higher

Requirements:

• Java 21+
• Linux/Unix system
• 2GB RAM minimum
• LibreOffice, Tesseract (for features)

Have some of you deployed it and used it? What's your take?

Thanks!