Very kid safe, been using it for homework help since I was nine! Never saw anything non kid-safe and for the most part, the answers are good or decent (some may be wrong or just rambles on useless things that would not really help with the question, JUST GET TO THE POINT KAREN-)
I don't think it is cheating, because when I ask a question, it is mainly for trying to understand the questions. So, no. Howeverrrrr, your question may take a long amount (maybe days) for someone to take interest in helping you. One of mine took weeks, it was sad because you have to have something to ask questions (forgot what... haven't been on it in one year.)
Other than that, 9/10 review for me :)