So much so that it justifies installing the app and then asking people you know to do so too? It takes no time to send a "yo" text with Siri, and if it's a person you have texted recently it's very fast and easy by hand texting too, so it must be really, really easy to make it worth it. I ask because I'm genuinely curious having not used the app before (for the reason that it takes too much effort to justify).