It's a good piece of software for what it is, but the tool is .kbdx based and like all such solutions tends to handle shared secrets rather poorly. It also handles adding new secrets for new accounts less elegantly than Apple's own built-in password manager which has a nice flow for adding anonymous forwarding email addresses and contact details for new accounts so long as you commit to the cult of iCloud.
Still if you need a multi-platform password manager that performs well on Apple devices there's nothing I can recommend since you can just use .kdbx tools on other platforms and strongbox itself has highly reliable multi-cloud sync, extremely fast input of secrets, a better security model than keychain itself has, and even has MacOS Chrome support (abliet hacky support) if you feel like trusting the plugin. It makes Bitwarden and other Keepass clients feel clunky in comparison.
Still if you need a multi-platform password manager that performs well on Apple devices there's nothing I can recommend since you can just use .kdbx tools on other platforms and strongbox itself has highly reliable multi-cloud sync, extremely fast input of secrets, a better security model than keychain itself has, and even has MacOS Chrome support (abliet hacky support) if you feel like trusting the plugin. It makes Bitwarden and other Keepass clients feel clunky in comparison.