Already excellent and always improving. Easier to use than 1Password and just as private and robust.

Along with the usual password manager set of features, you can also create e-mail aliases to hide you actual one, which in this day and age is an indispensable tool to put you in control of your identity online.

Proton also have shown responsiveness to community requests, implementing many features on their feature request hub in a relatively short amount of time.

One caveat is that if you're a Mac or iPhone user, you may need to read carefully what the feature available on your platform are. Everything seems to be on par now, but a Safari extension took significantly longer than the Chrome and Firefox ones, and older Macs had trouble installing even the desktop version. The iPhone app has also historically been a little behind the curve, but seems to have caught up. Ironically, the best way to change this situation is for more iDevice users to (vocally) use the extension!