Ask HN: Geeksforgeeks.org vs. Tutorialspoint.com

When it comes to reviewing CS, for school, or for preparing for coding interviews, a Google search on a topic often leads to either GeeksForGeeks or TutorialsPoint.

I'd like to ask HN, have you used one or the other, or both, and found it worthwhile? Or was it a total waste, if so what would you do differently?

Thanks!