Whilst useful as a reference for the dedicated rail enthusiast or historian, I find the hand drawn nature of the maps, including the rather washed out colour, looks amateurish by comparison with more modern techniques. However, in buying this book, one knows what the style is going to be - it is as much a piece of history as many of the lines it documents. Given a choice, I find contemporary OS maps more useful since the lines are shown in their geographical context, although some detail and company ownership is absent. Using the two together is perhaps the ideal solution.