Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Useful extras

I already have a 'Complete Works of Shakespeare' on Kindle. The advantage of this edition (apart from the fact that it is cheap) is all the 'extras' It has those hard-to-get 'apocryphal' plays which I happen to have a reason to study. For me this alone makes it a good deal. But the other extras are useful too particularly the commentaries by Johnson and Hazlitt. Modern Shakespeare scholars often refer to these works and it convenient to have them ready-to hand on my Kindle. It is easy to navigate using the TOC (which is where some Kindle editions fall down on the job). So all in all I rate it as excellent.