First thing to know is that it's not going to speed up, nor slow down the process of your case. 2nd. Yes, we get live updates, it is a lot easier and faster to check the status of your application than the official website for that purpose. 3rd. "Is it good?" Yes, it's a big community, imo it's a good to have someone going or have already been through the process, to ask for an advice, or getting information in general. And also you might be able to help someone in difficult situation too. 4th. Should you use it or not it's entirely up to you. If you need help deciding, just ask yourself the following questions: "Why did I install this app in the first place?"

yes

@M P M perfect response.