A quick glance at the two ends of this book suggests a potential weakness - it was first published in 1984 and its index makes no mention of Vindolanda, a site which has recently become as important as Oxyrhynchus, Egypt, for its letters documenting ordinary, Roman lives. However, as early as page two Salway refers to 'a small but growing number of personal letters discovered in excavations'. So this Very Short Intro doesn't need a drastic re-write after all.
In fact, the book does an excellent job of summarising the impact of the Roman Conquest upon the indigenous tribal populations of Britain. Initially hostile, Roman Britain became one of the most stable parts of the Empire during the upheavals of its declining years and, something of a surprise, wealthy, elite individuals from continental provinces would acquire a villa somewhere in Britain to act as a safe refuge!
Salway notes the great success of Romanisation - the transmission of Rome's core values upon disparate parts of the Empire. But two things are made clear as well: firstly, that 'Rome' is a relative term - many of the troops representing Roman rule were from other, non-Italian provinces (like Thrace and Batavia). Secondly, a native influence upon 'Rome' is also apparent - witness the readiness of Roman soldiers to worship local cults.
Whether for the general reader, in need of a brief introduction to the topic, or for students wanting an overview (perhaps as a revision aid) this is yet another excellent VSI, and is one that has firmly stood the test of time.