We run Hermes over White Noise daily, so here's what we actually hit.
The connector itself is solid. What's rough is everything around it:
1) Media has no configurable endpoint. Encrypted blobs go to hardcoded third-party Blossoms (divine.video / ditto.pub / hzrd149) and nothing in the app or the connector lets you change that. Your own NIP-B7 server list (kind 10063) is ignored entirely. If you already self-host a Blossom (we do, on our own Haven relay) you cannot point media at it. There is a build-time env (MARMOT_ENCRYPTED_MEDIA_BLOB_ENDPOINTS) but a rebuild dies on the next update, so it is not a real fix. Making the blob endpoint configurable, or reading 10063, would be the biggest win for self-hosters. Same for voice notes: they take the same path as documents, so whatever caps the endpoint caps audio too.
2) The connector prompt the app gives you is not enough. It often installs to the wrong profile or misconfigures the gateway, especially with multiple profiles, and you end up running several wn-agents and wiring them by hand. We had to fix ours by hand.
3) Sending a file trips on an invisible rule: MEDIA:<path> only works for files under the agent's allowed root, so the file has to be staged first. One line in the docs saves everyone that hour.
Happy to open issues or PRs for any of these.