Another possible feature they might be interested in is customer support for download issues. If they encounter problems with the download process, knowing where to reach out for help could be useful. However, I can't provide direct contact details but can suggest checking the official website's FAQ or support section.

But wait, I need to be cautious here. The user's query might be about something that's illegal or unauthorized. If they're looking to download copyrighted material without permission, that's a problem. My response should guide them towards legal avenues while advising against illegal activities.

Wait, but the user specifically asked for a "useful feature." Maybe they want to know about features that the content itself offers, like interactive elements, multiple languages, or exclusive content. However, given the title, which is in English, it's possible they're looking for the standard download experience.