I didn't actually finish the series, because it became more intolerable as Caesar's role increased. The more even-handed approach McCollough used to portray flawed historical figures such as Marius & Sulla disappeared, as she made Caesar as much of a Mary Sue as you can get with an historical figure. I thought Stephen Pressfield went overboard on Dienekes in "Gates of Fire", until I read "Caesar's Women".

I much preferred the portrayals of Cicero & Caesar in Robert Harris' "Imperium" & "Lustrum".

That's an excellent description. The level of detail as well gives a strong impression of the cultural context, and the familial interrelationships as well. After reading McCullough, I found myself recognizing characters in other fiction on the period, as "so-and-so's grandson, the cousin of whatshisname, etc, etc." This series gave me a level of familiarity with the major players of the late republic akin to the characters of WoT or aSoI&F. For someone interested in that kind of immersion in cultural and social details, I would completely recommend this series.