Instruct: Classify Amazon reviews into positive or negative sentiment
Query: only buy if you are ready to re-engineer

This product has screws that don't work, the bars move with ease, and only hold back a dog for a few moments. If you want to buy all new hardware, srtong glue, and springs to hold it in place, then you have another project to do with this "barrier". Too bad because it looks decent, but unfortunatly doesn't work well.