It's absolutely phenomenal. The only downside is that it requires you to know how to text -- send a text message. Nobody over 40 knows how to do that.
那些东西真的很牛叉。唯一不怎么令人满意的是 你需要知道怎么写短信 还有发短信。那些年过40的人基本上没人知道怎么做