its ok, nothing spectacular, yet another semi proprietary format, just what we dont need
I dont have any big issues with it other than how I see it used the wrong way all the time, for example, the "scene" insists on using it yet when you make a torrent a file gets broken up into chunks anyway so it becomes an extra useless step. It might save 1-2% in size on a video file, but it also costs minutes in time, isnt worth it.