The features they have included, mostly, and complete lack of any KYC needed. They have: Nostr Wallet Connect eCash for privacy Lightning address for receiving zaps BOLT12 Easy to use UI And I am sure I am missing something. As always with custodial solutions, you are absolutely at risk of being rugged, so don't keep much on there. Personally, I am using Alby Hub on my own Start9 with a parallel CLN node for BOLT12, so I have all of the above features, except the eCash part, completely self-custody. For those who just want an easy custodial option, though, it's hard to argue with what @Mysterious Hamster has going for them.