It's more decentralized and anonymized than Signal, but it's not run by a non-profit, and it's definitely not nearly as tested as Signal. Honestly, there's not a whole lot that will get me to move away from Signal as my main encrypted messenger, but I do like to experiment with Session and SimpleX for a little bit of anonymous chatting.
I'd say it's a decent option if your threat model requires anonymity moreso than security and confidentiality. Signal still has the most proven track record and strongest encryption standards so far.