Product Download Pages
These pages appear deceptively simple, but their previous iteration posed a not-insignificant problem for users. The COMSOL suite of software includes COMSOL Client - basically a small program for read-only viewing of the models created by the main software. Think Adobe Acrobat, but for physics simulations! Due to the previous layout of the download pages, users were often accidentally downloading COMSOL Client when they meant to download the main COMSOL Multiphysics Desktop software.
After this redesign, instances of that happening dropped off dramatically. It's a small thing, but I'd call it a success!