Although some of the plot points can seem slightly contrived Edward Marston's books are never less than enjoyable. I generally read them at least twice and they are a real race through the time of The Conqueror. I think the background detail is good - certainly in respect of how easily, or otherwise, various cities fell to the Norman march - but it doesn't overwhelm the narrative.
The characters can seem a bit modern at times with their areas of concern but it is a small thing.
I have yet to pick up one of Mr Marston's books that I haven't enjoyed.