it's very good!
this is the only loudness analyzer i've tried which shows a graph of the True Peak values in the histogram.

only downside is the price, but i've seen more expensive with less features, and this is aimed squarely at the pros working in the broadcasting, movie and music industry.

really beautiful and the workflow is top notch.

i've put up a quick overview on Youtube:
https://www.youtube.com/watch?v=7UNhXWe8ioM