Yes, MyGov is interactive, we can do our account things online and they have a phone app too. Of course, as with all things government, it doesn't always work and there are a lot of complaints. A lot of the time it is simpler to get in the car and go to the office.
Yes, and for the most part it is easy to navigate. This one time, however, I had to call the helpline because I couldn't locate something, and not even the person on the other end could find said thing.
Yes, us pensioners mainly have to, and the government encourages you to use it too.. so older people without computers have to line up and wait in their unfriendly atmospheric branches! Recently I wanted to hand a document over the counter, "she" said scan it whilst in their office for them! No - it is not easy to navigate to some areas and I find it slow to access as well.
I have used it and found it frustrating. Forget your password and you're in for it - can't just reset like with anything else, but have to set up a whole new account and go through the process of linking everything to it again. Hopefully it improves.