Don't waste your time with the ADX. It is just as worthless as any other indicator. Go with your emotional feel and make it as exciting as possible. When you use indicators you take the sport out of trading.
I tested so many systems a few years ago I stopped counting them. I tried to include ADX in every one of them and I threw it out every time. It's going to depend on your trading style probably because a lot of people swear by it.
Indeed, very useful when used 'properly', and that's the keyword. I think it beats CCI (very liked by some and overrated to me) and it is certainly as good if not better than stochastics.