Sign in to the supported storefront accounts you use in Heroic Games Launcher and install a small sample of your own games. Test launch, updates, cloud-save behavior where available, controller support, and the way a game recovers after an interrupted download.
On Linux, compatibility settings may be game-specific; record the configuration that works rather than assuming one default fits all titles. Back up saves before changing launchers. Judge the tool by the games and devices in your library, not screenshots of someone else's catalog.