content: I'm trusting the EFF, and they rate TextSecure as pretty secure.  I'd try SMSSecure, but the main advantage of TextSecure to me is that it does use servers, so I know the message got there.  I think it's great that SMSSecure doesn't need web, and goes over SMS alone, I'm just not sure I need to jump yet.  Really only have one other person using it so far anyways.