Udemy Courses, are they worth it?

As you said, they are helpful for personal education, if you want to learn a new skill or just get better at something. I have never bought a course that was more than about 10 bucks and don't plan on doing it.
I wouldn't never ever go to a job interview with an Udemy Certificate too as I don't think it proves anythin nor do I want to embarass myself.

Before buying one, I would recommend looking at the previews, reading some ratings and looking up the instructor.
To be honest, I doubt that the courses over a 100$ are worth it.