HireVue was fairly easy. You get four retakes, unlimited time between attempts, and the questions are quite straightforward, covering all the main competencies which will be told beforehand. There are also two short games, one with shapes and one with numbers for memory, both scored by AI.
I received very good results but was rejected a few weeks later without any feedback. If candidates are expected to spend their time completing these assessments, it would only be fair for the company to spend a little time providing feedback in return.