My Take
I have no idea why the school is still using this highly unreliable aplication for conveying important messages to parents - it should not, and I'm not the only parent in the class who missed the messages because of the software glitch.
How I Use It
It's a good app until... it silently logs itself off on your mobile device and you stop receiving the notifications about new messages, and of course you don't know about that until you miss an important football match or an urgent teacher's message.
That happened to me three times already - my son missed a place in a cricket squad, my daugher missed her footbal finals, etc, etc...