Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very handy and convenient item.

This accessory shelf should be in every percussionist's stick/mallet bag. Keeps sticks, mallets, brushes, beaters, etc., in easy access especially when changes need to be made quickly and seamlessly. Paired it with a shelf extender and the combination is a winner for a 3-4 page music spread and a place for sticks, etc. Passed my test at this afternoon's concert performance! Also, this accessory can be easily modified (i.e. notched for mallet heads, holes for triangle beaters) as desired.