Very sophisticated– frees people from having all security eggs in one basket, and is FOSS, replete with very valuable features, available on any platform you can hope for—which also makes it redundant and therefor more fail-safe way to keep your access credentials, well, accessible—and intuitive to use. Even the import guide, such as for duplicating other vaults/keychains is superbly helpful. Quite a fine-looking website, too! 😄 Do yourself a favor and just start using it...but do the world a favor and "buy this dev. a coffee" (there's a donation link on the app's F-Droid page – main repository! 🤯).

So far, so good.
Thank you.