Would recommend, however In my experience it has taken a long time to convince some friends to use anything over FB,SC, and SMS. Most still won't and I simply refuse to answer them. They don't see it as any different than the other 4 apps they already have to chat from. That being said I have found it a bit easier in a "first time" meetup experience to convince someone to start using something like signal assuming they want to keep in contact and that's the only option you give them.