Cain appreciated the performances and storytelling, but singled out how the show nailed the Fallout “vibe” as its biggest achievement. “I was just looking at all the props,” he said of one scene. “I realized after a few minutes went by that I had not followed the dialogue at all, because I was so engrossed by it visually.”
On a more sour note, Cain took time to address the way fans of the series can behave poorly online, particularly regarding any perceived rivalry between Fallout entries developed by Bethesda (3, 4, and 76), and those from Interplay, Black Isle, and Obsidian (1, 2, and New Vegas). Cain spoke positively of Todd Howard, and said that “Some of the stuff you [series fans] say online is so off.” See also: the debate about whether the show somehow overrode or ignored the events of those non-Bethesda games, which has since been denied by a senior developer at the studio.
That site visualizes the per-episode reviews from IMDb so its only as good as its dataset.
I find it most useful when choosing between shows, if I know that a series falls of a cliff if the later seasons I might choose something more consistent instead.
My advice would be to search a couple of other series you know and see what their numbers look like. That should give you a benchmark.