Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Not the best of British Mystery series

Compared to the Poirot, Midsomer Murders, Miss Marple, Mrs. Bradley mysteries and the Jeremy Brett Sherlock Holmes series, this set of DVDs is a great disappointment. There are only a couple of the DVDs worth watching the rest are victims of marginal acting, weak plots and dull screen writing.