It doesn’t work on safari iOS … doesn’t use existing Nip05 addresses … and the onboarding flow is definitely “obscure”. 

I had to write my own local key encryption and storage, implementing Nip49, cause nostr-login just won’t work for my onboarding client. 
nostr:note1re253kvltqg7rh6l425a26w07g7uwt9yfgxtz3hsewtvf6e0gelqtmds5d 

 Onboarding is the same as with other nip46 providers (except for request for push notifs), Safari will improve when Push API is out of experimental status there. Use of existing nip05 is possible, it's on the roadmap.