I received one of the firs units shipped and it arrived damaged. However after a couple of pics and a phone call, Adam's customer service got me the replacement parts I needed. The cart assembly is straight forward and took about 15 minutes total (to include the replacement of the top shelf and one support.) Now, the unit itself is well thought out and sturdy, it holds all of my supplies, and car detailing tools. The casters are solid rubber and large enough to get around without a lot of effort. The notches for holding buffers are sized well, and the cart is heavy enough to prevent tipping over. The overall height is good and the shelves are just far apart enough to store a lot of Adam's (and others) chems and cloths. I am looking forward to many years of use of this and my other Adam's products.