Read in parts, and reviewed below accordingly.
Overall: The text is quite readable and the history contained therein is often fascinating and sometimes mundane, perhaps a reversal of history as it actually occurs but certainly a favorable way to relay it as a text. Tacitus steps out from behind the writing at times, and the way he understands his role as an historian is important to understanding what he conveys, and how. As a text, this edition lacks maps and could use a directory. Since Tacitus jumps around the several fronts of the Roman Empire, some kind of historical atlas would have been helpful.
The Annals: The Annals detail the years of the Roman Empire from the death of Augustus, through Tiberius, Gaius, Claudius, and nearly to the end of the reign of Nero. While I cannot speak to the accuracy or spirit of the text as taken from the Latin, I found this translation to be highly accessible and immensely interesting. I admittedly have no basis for comparison from other volumes of Tacitus, so we will leave it at that I thoroughly enjoyed the examination of how a historian's portrayal influences the history about which he writes. Tacitus, for example, lived through the reign of Nero, and has a particularly unfavorable opinion of him--this is clearly conveyed in The Annals, and has likely influenced the extraordinarily negative legacy still carried by that emperor almost 2 millennia later.
Historiae: The Historiae detail the Roman empire after the death of Nero, through an intense period of 4 different emperors in A.D. 69 (Galba, Otho, Vitellius, Vespasian). The works are supposed to have covered A.D. 69-96, but only parts remain. The histories of Tacitus meld artful storytelling with historical fact, and as Moses Haades shared in the introduction, being a historian was at once an art and a science when this was written, circa 100-110 A.D.. These books (1-4, and a small part of 5) detail a spectacularly tumultuous time of civil war, with constant betrayal, chaos, mutiny, and battles between regions and ethnicities within the Roman empire. Unlike the sometimes plodding chronicling of The Annals, the account of the Year of Four Emperors contains so much action, it's often difficult to follow who is fighting whom, and on what side. The books cover many battles and other events in quick succession.
The Life of Cnaeus Julius Agricola: A quite flattering eulogistic account of the life and accolades of Agricola, Tacitus's father-in-law.
Germany And Its Tribes: Another mostly flattering account of the culture Germanic tribes from the account of this Roman historian.
Dialog on Oratory: This recount of a lively (and seemingly timeless!) debate about whether the best orators are in the past or the "present" is also a good-natured and amusing trade of witty banter among rhetorical combatants.