Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It was so small and so useful!

I bought the olympus digital voice recorder for my singing class. It was recommended by my voice instructor and it works great! The sound quality is awesome--it doesn't pick up background noise like other recorders I've used. Plus, I really like that there are several folders so I was able to organize everything. I used two of the folders to keep notes from my discussion classes in college and the others for song samples.