I do my fair share of hiring and interviewing, and I agree with alain94040.
I have very hard time imagining that the rock star developer I'm trying to hire will spend $100 (or hours of their time) to add fancy styling to their resume. Why would they? It just seems like trying too hard. Of course I won't reject anyone because their resume looks "too pretty", but those templates make the resume stand out, and not necessarily in a good way.
I also want to third this, for tech hiring anyway.
I have far more time for a plain text resume that fits on one side of A4/Legal, than I do for anything else.
It's all about how quick I can scan the document and extract information from it that might tell me what experience a candidate might have.
For me, the quickest way I can scan something is to have it feel like something I work with every day: logically laid out text, in fixed width, with related chunks fitting on the same screen.
Give me a plain text resume any day. If you deeply feel the need, add syntax highlighting in the form of very subtle highlights and lowlights to make the most pertinent sections and key facts stand out. But if you do that, bear in mind that such highlights and lowlights should be the minority of your document.
I have very hard time imagining that the rock star developer I'm trying to hire will spend $100 (or hours of their time) to add fancy styling to their resume. Why would they? It just seems like trying too hard. Of course I won't reject anyone because their resume looks "too pretty", but those templates make the resume stand out, and not necessarily in a good way.