It's somewhat nice that Schama immediately addresses his subjectivity, with 'A', rather than 'The' in the title. The book really is a personalised trawl through history, but on the other hand it doesn't feel too twisting.
I'm really no history expert, though. Indeed, this is pretty much why I read the book - I've neglected the subject and felt I should at least catch up a little. As the truism goes, those who don't know history are bound to repeat it, and reading a little history seems a better incremental use of my time than reading more maths or computer science. Oh, and it's a little easier to read on the DLR in the morning.
The book is based on his TV series, and in a couple of places it shows, as the explanation is sometimes rather narrative, and the descriptions rather visual, but mostly it steers clear of TV stereotypes. In fact, I think the colour plates are the weakest feature of the book, being detached from the text and remarkably uninspiring.
So, while I can't comment on the quality of his historical interpretation, I can say it's a good, fun read that can help you understand the wider sweep of history in this country. Covering several thousand years in a few hundred pages, he can hardly do more than skim, but by a careful choice of people and big events Schama provides a good core narrative and dispel the occasional myth. It leaves me wanting to know more, and the bibliography is comprehensive, but somewhat overwhelming. Perhaps I'll just read volume two.