Probably the best assessment I can provide of Stuart England is that I checked it out for research on a limited sub-topic, but read the entire work anyway. I was impressed enough by a strain of wit and humor to see it through as recreational reading. Looking back now, however, that wit seemed to dry up after the first few chapters, leaving the remainder of the book too much like an encyclopedia article.
There are, as Holmes would say, "points of interest" all the same. Despite the arid style, Kenyon does give consideration to themes and interpretation, and often challenges familiar orthodoxy. By no means is he always convincing, to my mind, but his arguments did at least prove interesting and thought-provoking once sifted from the dry chaff of facts and events.
Bottom line, though, if you're seeking an overview of Stuart-dynasty England: you can probably find more engaging options elsewhere.