Google has done good job in communication. They replaced hangouts with google allo. App is good nothing huge difference. It is same as Whatsapp, hike, messenger and more. But the best thing added by the google is that google assistant which attract users. Google assistant do all your smartphone work and schedule it as you mention to assistant. Work like to call someone, installing apps, schedule your alarm and lot many things. You can ask your g assistant to give everyday news, misic videos, songs, games, books, wallpapers on just one day command. Overall decent app for user.