Needed a good heavy duty shelf for our basement large storage room. Even though it's just a storage space, the room is fully finished, well lit and regularly accessed, so we wanted something that looked good and wasn't going to hold dust or develop corrosion easily. I Was a little put off at first by the price until I started comparing this unit's features & reviews to the lower cost units. This is a well made, heavy duty rack with full width, beefy load support struts spanning each shelf down the centerline. the 4 support poles are 1" dia, and shelves are constructed primarily using bright 1/4" wire framing all around and 1/8" wire on 3/4" spaced centers from front to back. We opted to assemble using the leveling feet rather than the wheels to keep the load capacity up and to provide a little back tilt toward the wall since it rests on a carpeted surface. The support posts are grooved fir shelves evey 1" and we spaced the 5 shelves evenly on all except for 1 extra inch between the bottom 2. The end result is exactly what we wanted. We're so satisfied with this purchase, we plan to get another to use in the same space.Some additional comments:It weighs every bit of 94lbs in the box. This is a 2 person lift for safety sake. I can't vouch for the 600lb per shelf capacity (3000lb total) but if the load is evenly distributed and you don't use the casters it's likely more than enough capacity than most typical home or small business uses. In any case, we don't plan to load more than 300lb/shelf.The box had a good bit of handling "rash" and torn areas but did not appear to have any penetration or crushing damage as recieved.The shelves are packed with disposable plastic spacers inserted in each corner so they nest and travel as a unit, however, nearly all 20 of those shipping protectors were crushed or broken. Despite that, nothing appeared damaged or deformed and the shelf was very easy to align and assemble. Finished appearance is impressive and not different than similar units I've seen over the years in commercial environments. You just need to make sure you put the support sleeves on correctly and in the right orientation to ensure they engage the capture feature grooves on the posts. Not doing that is about the only way to mess up assembly and end up with an inadequate shelf unit. No tools are required unless you want to give each shelf corner a whack with a rubber mallet to engage the shelves a little more emphatically to make the assembled unit easier to move into its final position.The package includes both leveling feet (for higher loading/stationary use) and 4 beefy 3" dia x 1' wide molded casters. It also included enough hardware and post caps/inserts to allow you to build it as two 3 ft tall shelves, although one would be wheeled and one stationary unless you were to acquire more wheels and/or feet at you local hardware store. 2 of my shelf support sleeve pieces were broken in shipment, but the bag had 2 spares included, so no harm or foul.A number of reviewers apparently received damaged units so I'd be concerned if the box arrived with crushed corners from bad handling, but if the box looks ok, then you should be happy with your purchase.