Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Product!

This is a very similar product to the BOSU ball I use at the gym. It was fairly easy to set up. The only problem is removing the plug on the bottom if you need to add air. I ended up using a plastic tick removal tool to pry the plug off without damaging it. I have been very pleased with my BOSU ball. It has stayed inflated for several months now without any noticeable air leakage.