In my opinion, one should learn LaTeX and use these templates as a good source of how-to, rather than copy, paste, find, and replace. Then, once the resume has been completed, they should get it looked over by someone they can trust to give honest advice and has a business mindset. This is what I did when I wrote my resume, and after I finished it, I had more confidence when I handed my resume over to someone, knowing that I had crafted it myself.
These are a good start for a Curriculum Vitae (CV), but you need to tailor the CV to the job, and to your own style, the advantage of LaTex is you change the style easily while leaving the content unchanged.
I wrote my resume in Latex, but it wasn’t with one of these templates. Anyone who’s curious feel free to ping me. I’m open to sharing.