If you are interested in the proper history of costume, this book is not for you. It was created in the 19th century, when costume history was at its beginning and it reflects all major faults of the researchers of that time. Many things, claimed to be true at that time, are now proven to be completely wrong. Personally, I have found some blunders in this book. So, if you want to do a thorough and accurate research for your costume, refer to the modern researchers, authentic paintings and manuscripts. Definitely not this book. It is like using 14th century manuscripts for studying modern English.
But if you want to compare the work of modern and Victorian authors - go ahead, this is a wonderful example.
This book can also be quite suitable for those, who are interested in theatrical costume, where looks come first and authenticity does not matter.