For all the negative replies I wonder how many people actually have used Keychain. It's very good. I tried onePassword, google's, and firefox's, but none integrates as well among all my devices and with zero effort in the OS as keychain. Anyone leaving negative comments about keychain, at least point out that you've given it the ol' try in the Apple Ecosystem.
Or we have different assumptions and you have devices outside the Apple ecosystem or don't want to be tied to it therefore the benefits I see to keychain don't apply to you.
Also the WWDC yesterday has some cool new features about bad passwords (But I think other password managers already do this).
(Not affiliated with it, just a pretty happy (free) user!)
Does it actually work the same as Mobile Safari's interface on iOS? Automatically presenting options both for creating and autofilling passwords on webpages? (If it can do that in iOS Firefox, I might consider it...I've been using desktop Firefox for a while because of some bizarre idiosyncratic issues I have with Safari on my laptop, that I can't reproduce anywhere else, but are extremely irritating where they do happen...)
A big benefit of switching to Bitwarden is that you can also get it up and running on non-Apple machines. Kicking myself for not doing it earlier.
Just be aware that bulk exporting your passwords from iCloud Keychain is non-trivial.
If you create a Netflix account on your desktop in Chrome, it can generate a password for you, or auto-grab whatever password you typed in, and will autofill that password when you open the Netflix app on your phone. (Based on a built-in association between "netflix.com" and the Netflix android app.)
Super handy feature when you get a new mobile device and need to get logged in to all your apps for the first time.
Yeah, keep telling yourself that. They are a part of PRISM.