This covers the military and political history of Rome from the foundation of the Republic (507 ish BCE) to the final collapse of the Western Empire. It concentrates on high level politics and military campaigns; covering them well, albeit briefly. There is little room for comparison of divergent sources and the author states in the preface that he would stick to a single version of any incident. Though this makes for a good read it can lead to the perpetuation of some tales that other scholars dispute. For example the fate of Regulus after the Battle of Bagradas, this is disputed by Goldsworthy(The Fall of Carthage: The Punic Wars 265-146BC (Cassell Military Paperbacks)
and is not mentioned by Polybius The Rise of the Roman Empire (Penguin Classics)
Though some of the writing is a little clumsy (words are occasionally used more than once in a sentence where synonyms might be more common) this is a useful introduction to the subject. However the attempt to compress a millenium of history into around 400 pages mean that this is something of a whirlwind tour. If you already have books on Roman history then this will not be of much interest to you. For a newcomer to the subject it will be of greater use.