It's worth noting that it's not possible to disable the official servers for now, which do censor lots of content.
Oh and the app is incredibly unstable and has a tendency to leak memory until it crashes the host.
They lie by omission when they say that the service doesn't have any user IDs. What they really mean is, the application does not add its own long term identifiers. But by default, the application takes zero steps to anonymize your IP address from the server, meaning the server can very probably tell users apart.
It's also ridiculous that the entire public server infrastructure is hosted under two companies: Akamai and Runonflux. Roughly 50% of your conversations can be end-to-end correlated by a single VPS company.