The Google Messages app is pretty good. It's a little thing, but it's the only app that supports tapbacks from iOS -- so on the (many) group threads I'm on that have iPhone users, I can see loves/like reactions instead of a flood of texts that say "Jane Doe loved an image".
rcs support works well, the emoji reactions are good. the web ui for it is pretty alright. I use the quick responses and scheduled send from time to time. and it cleans up my 2fa codes automatically.
Also, it now sends emoji reactions over sms which is a nice little graceful degredation from sms.
It's terrible. Every once in a while they decide to convince me that I really don't want to be sending an SMS but I want to use google's messenger of the month, that will inevitably be gone next month.