I got in it recently. Feels like a wrapped Nostr client in an AOL style universe. Might be ok for newbies less knowledged in the platform. If you bring over your existing Nsec you will be converted to their NIP-05 inside on sign up. If you go with a new account, the Npub is buried in the account settings and you can set a recovery password. No current way to swap Nsecs attached to your ZBD account. Don’t see anywhere to add more relays so I guess you are using only theirs for now. They do say more stuff is coming soon so who knows.