Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Junk

Just like every Rubik's cube I've ever had, this one is a piece of junk. The folks at Rubik's have always made a substandard product. I had one of the knock-off brand cubes as a kid and it seemed to be much sturdier. Common problems with Rubiks' products...1) stickers fall off, and 2) the whole thing becomes loose and sub-cubes start to fall off the main cube. It's junk.