Instruct: Classify Amazon reviews into positive or negative sentiment
Query: good product

I have 6 of these units and I plan to purchase 3 more. I also have one larger one. It's a great way to organize the garage without installing permanent shelves. They are easy to roll around making it convenient to clean the garage floor or arrange a working or parking space. Holds tool boxes, parts, camping gear, etc. Two quality control issues I have noticed: 1. The grooves in the corner poles are not always deep enough for the plastic inserts to get a good bite and hold the shelves up. 2. The grooves are not always spaced the same in each pole, making one corner a little higher or lower than the others.