Aside from a glitch I once encountered while using Qwant, I've never had a problem with it. I'd also recommend using Searx and Startpage (just don't use the latter on the Tor Browser because of compatibility issues, as I found that out the hard way).
Update: Be aware that although Qwant claims to stand behind user privacy, it's still proprietary software and has used Bing since it's inception to aggregate results. Also, Startpage is now owned by advertising company and has been subject to controversy because of that.
tried most of the commercial ones over the years settled on Duckduckgo , i got fed up with wading through pages of crap sponsored results that had nothing to do with what I was looking for..
EG last year i was looking for a canvas repairer in my local area, duck gave me the answer within 4 entries, a friend searching the same on google got to page 8 and still nothing local,
As for me, this is not the most reliable disk for storing data, because it is little known. I advise you to use other drives to store your data, it will be more reliable and safer. According to statistics, those disks that have more advertising have more reliable protection, I read an article about this