I set it up on my Raspberry and run it locally in island mode. So I use it separately from duckduckgo. The quality of the results depends on which mode you use and what you are crawling You can set rules etc. for the search results or their sorting, but I haven’t dealt with that, but it looks powerful in terms of scope. The tasks for crawling can also be set very precisely, including how much hardware resources can be made available for usage and much more. You can also set when and whether these are repeated. With the depth, the whole thing can quickly take on extreme proportions and should not be exaggerated. As I don’t surf the web that much, I have relatively few sources. If I don’t find anything and have to use DDG, I take the domain from the best result and create a new crawl task and then start it. It is definitely worth a look. If you really want to, you can definitely host a powerful search engine yourself.