I did purchase 2 5” swivel wheels at harbor freight because I have to maneuver the cart in tight spaces and it was a bit difficult with only 2 swivel wheels. Other than that, I’ve added magnets on the sides to hold random tools while I’m working. I also added a rack with hooks in the front. I keep in my garage and when a quick project needs to get done I load it with tools and get it done. This cart is awesome!I bought this cart to cart around a small selection of tools and supplies around the plant. It sure beats pushing around a heavy tool box. I keep some chemicals, rags, and a small bucket for trash on the bottom shelf. The top shelf is a good size. The width is perfect as some spaces are narrow and this cart seems to be the perfect size to squeeze through otherwise impassable areas. It comes with cheap casters. 2 swivel and 2 fixed. They are NOT ball bearing. Only a shaft through a plastic wheel. I replaced them with 4 swivel casters I picked up from the local hardware store which are ball bearing and it rolls much better now. The mounting plate hole pattern is a standard size so many after-market wheels will fit this cart just fine. The increased steering capability of 4 swivels can be a love-hate-love relationship; sometimes it doesn't want to steer straight, and then there are times it is able to maneuver in the tightest of spaces and I absolutely love that they all swivel. The handle sticks out so you wont kick the cart with your feet and provides a nice little catch-all bin for wire nuts, screws, etc. and there is also a pen holder which can accommodate several pens, markers, and utility knife. The handle is comfortable and at the right height for me - I'm 5'10" and I don't have to hunch over to hold it and my feet don't hit the cart or wheels. It seems very sturdy and I feel comfortable it will live up to it's weight capacity rating without any issues. Assembly was a breeze with a minimal amount of fasteners.Very handy cart. Strong, easy to maneuver and scoot through even narrow aisles and doorways. Really like it.Although I have a cleaning business, many of my accounts are smaller and don't require a cart like this. I got a good deal on this purchase and couldn't pass it up. Works well.And now… as to shipping. Congratulations on getting this to me in a timely way. The rest of this post is not directed to this product or this seller, but to Amazon and UPS. WHEN WILL YOU GET YOUR ACT TOGETHER??? I currently have FOUR packages delayed being shipped by UPS. Amazingly, some other packages being shipped by UPS have been delivered, most of them on time. I'm a member of Amazon Prime and am supposed to get free delivery within 2 days. Hey, if it's 3 I never say a word. But 6, 8 or by the time things finally arrive, 10 days?UPS says it is due to 'inclement weather' as to the reason for the delays. REALLY? Here's a news flash, UPS: It is winter. It gets cold. It often snows. It does this each year. It is called a season. So tell your drivers to put on hats and gloves and put chains on your tires and go do the job you are getting paid to do.Of the 4 packages being delayed, there is no expected delivery date. At the earliest, it will be 5 days LATE. No, not a total of 5 days, rather 5 days late. Amazon, you really need to consider another source besides UPS. Your drone idea made for a nice media splash, but with your money, why not start a competitor to UPS and FedEx?Holds a lotOverall more costly than other available carts but I trust the Rubbermaid brand and like the ergonomic handle. The cart was easy to assemble and feels very sturdy. The only thing I would add is a lock on the wheels.Why? Are they that much more expensive? When you're pushing heavy loads, which this is designed to do, you don't need to be lifting an end to get into an elevator. It's not like any of the wheels have a lock mechanism, either. See: heavy loads.Be warned if you are not used to a power driver: the heavy metal screws will go right into the plastic.Also - NO INSTRUCTIONS. I realize it's supposed to be self-explanatory, but the order in which you assemble can mean the difference between a nice flat surface and a slightly wonky one.But it's Rubbermaid and it's "Made in USA." So it's a really good cart.Keep in mind, I'm a woman at work who normally doesn't need to own a drill so when I decided to finally assemble this cart, I used a regular screwdriver. Wrong move! Although the screwdriver worked, it was long and strenuous as the screws required a lot of wrist power. I ended up giving up half way and asked the Engineering men for assistance. They came with a power drill and finished the job within 20 minutes versus my 1 hour. For a woman, let's just say I had a work out assembling this cart, but it was all worth it. This cart helped me transfer heavy equipment like 10 small form factor desktops, multiple monitors, network equipment, etc... It held up even when I doubted the amount of weight it could hold.