Moved my grandma and some family over to it. Zero complaints after ~2 years of using it, and that's the best part about it. You don't need to be a "geek" to use it. Knowing everyone's data (at least in transit) is secure is pretty great.

I'm curious what bugs you've experienced? The only ones I've seen are on my friends' phones and they are because those phones have extremely aggressive battery optimizations that essentially block Signal from running in the background. Once it is turned off then things work smoothly. I imagine this is a network effect related issue and that apps like WhatsApp are getting special presets because their popularity.

Out of curiosity, are these friends running Android or iOS devices?

Android. Usually cheaper phones too.

My whole immediate family and parents are on Signal because of me. They prefer the call quality and access to desktop messaging.

For my part, I find it fully amusing when a add another parent to my contacts, and they come up in Signal. <3