It's 4 episodes at about 45 min each, so not a quick watch. I thought it was decent and very balanced. They've got a good set of talking heads, though notably Dom Cum, May and Sunak have opted not to be involved (a good call no doubt) and Acuri, Dorres and the haunted victorian pencil are very annoying.
Not a lot you don't know already, but interesting as a complete picture of how much Boris' career aspirations influenced Brexit and how inevitable it was that his stint as Prime Minister was doomed to failure.
Give the first one a go and see how you feel.