I've been testing it for about a year or so. Relay really like it and the progress they've been making. I've played with creating personal chat bot to go do web service things with it. I like the multiple profile aspect of friends/family vs private to chat in simplex public groups if you like. I'd like to understand if simplex protocol is better in privacy and security than current or Dev path of Nostr DM protocol. I'd like Simplex to be able to support Nostr protocol as a rail to have Nostr contacts info added to Simplex profile interface to handshake them into a temporary Simplex session using Simplex features like say a video call or chats so that those are not on public relays as example. I saw Jack gave some funding to the team as support. Nice.