I love this rack. It's perfect for storage in my garage for the bulk items I purchase at a big box store. I like the back rail for each shelf as it keeps items from falling down behind the unit. The wheels make it easy to move if needed, as well. Sturdy construction. The reason for 4 stars and not 5 is because it's not the easiest to assemble and the instructions weren't that easy to follow. Luckily I had someone whose put this type of shelving together before, so she knew what pieces went where.