Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Singing so merrily, trial-la-law!

This is the first volume of Braude Bros.' "Gilbert & Sullivan Project", a Herculean effort to produce the definitive critical editions of the Gilbert & Sullivan operas.The result is nothing short of extraordinary. Working from sources dating to the autors' lifetimes, Steven Ledbetter and his team of editors and researchers have put together an edition to put all others to shame. Features include:*Complete, annotated libretto, with illustrations by Gilbert*Trial By Jury in full score*A Critical Apparatus detailing every discrepancy between their edition and the source scoresThe edition is printed on high-quality paper, attractively bound in a light-blue hardcover. The clear, easy-to-read formatting of the music makes it a practical score for conducting the opera, as well as a scholarly tome for musical study.I confidently and enthusiastically recommend this score for all lovers of Gilbert & Sullivan, and for all companies wishing to perform Trial By Jury.