What Do You Think about This Seamless “Registering/Login” User Experience?

This really disturbs me. What's the security model for this?

Even if the site never learns my Google identity, I hate having to close the signup window. If I misclick, they get my identity. It's so sick.

I've seen these before; it feels way too intrusive and out of place on the page. If I'd clicked a "sign in with Google" button, then okay fine, but a big dialog covering the corner of the page? No thanks.

Checking out that page, the traditional signup button (which is what I'd use as I'd rather not use Google login) is actually under that dialog. You can't see it until you dismiss the dialog.

A big no no for me. Seen a couple of sites and never tried clicking. I'd rather use the 'sign in with google' button where I get to confirm rather this privacy insensitive method.

I find it to be intrusive and disturbing. Medium.com does this and I've always hated it.

Mediums usage of it actually caused me to switch, on my work computer, from always being logged into Google, to never being logged into my Google account. Now if I have to use one of my companies apps that requires a Google login, I do it incognito.

At home, I never browse while logged in, so I didn't ever notice it that much. Using my Google account for logging into a third party web application is never my first choice. I'll take separate email / passwords for everybody please and thank you.

It's probably using google oauth SDK https://developers.google.com/identity/protocols/OAuth2UserA... (there's no popup raised if you're already signed in google). You can then send and validate the token on server-side, and create an account there