I use it and I like it.

Uses double-ratchet from Signal + some neat quantum resistance stuff, uses user-selected relays to send messages and doesn't use persistent user identifiers. Lots of metadata privacy to be had :) 

 Is it good for day-to-day use like to talk to my family, for example?  

 I would say yes, just make sure you select the kind of notifications you want 

 generally yeah, unless you're looking for some more fun social features (stickers for instance)