If used in conjunction with Ublock Origin, it is redundant. On my PC, I just use it to access their email protection service (I then toggle the extension off after job is done). Nevertheless, it does a good job of rating websites and provides us with a thorough breakdown of the trackers in use.
And their mobile browser is a must-have browser in my opinion because it's light, simple, and minimal—especially that clean button.
The element picker and dynamic blocking feature are the reasons I especially chose Ublock Origin over DDG extension.
Try it if you tend to install something and then forget about it.