Instruct: Classify Amazon reviews into positive or negative sentiment
Query: very cheap materials

two major problems:1. after less than 6 months, one of the clips you use to fasten the front flap pulled right out of the fabric, and this bag was not put thru heavy use2. the shoulder strap is junk. if you put even a few books in the bag, it's enough weight to consistent pull the strap to its greatest length, because the adjustable apparatus is so cheaply made it won't hold. therefore, the bag is always down around your knees. looks pretty stupid, and very cumbersom.it looks nice when you get it, has nice pockets, etc, but the two problems i describe above render it uselss. do not buy this product.