I remember writing over ten years ago “beware the corporate redesign, because it often tells you the company has run out of ideas”. But in this age of branding, it’s worth considering creating an “image” for even the most basic product lines; just don’t spend too much time and expense on it. A professional logo on a product and its sales material isn’t pretentious, it’s something the product ought to deserve.
That said, do the product justice. Please don’t design the logo yourself in Microsoft Paint. Get a graphic designer to do it, but just agree a sensibly low budget beforehand. And tell the designer that you’ve read Why Logos Should Be Designed as Vector files and Other Suggestions for a Quality Logo on the Rethinking Marketing and Branding blog – and that you expect them to have read it too.