dbest Quik Cart Stair Climber

This is my second purchase of this cart in 4 months. I love the size and how easy it is to handle. I live in a highrise, and the cart makes bringing in my groceries much easier. It folds fairly easily and fits in the back of my SUV without taking up much space at all. The small folded footprint is a huge plus for me. My first identical purchase of this cart was made 4 months ago and had full plastic pieces that fit over the entire left and right sides when the cart was opened up. The plastic pieces stored very securely and nicely in compartments in the inside bottom of the cart. I liked that system much better than the sliding "lock" on my second purchase of this cart. The lock does not slide very easily. I took a lubricant and rubbed it along the track and it helped somewhat, but the lock is seems quite flimsy to me. Hopefully it will not break, because my old side pieces won't fit over the sides of the newer version. The top is very handy and sturdy. The attachment "hook" is just OK. Sometimes the top is difficult to hook on, and sometimes it falls off. You CAN sit on the top when the cart is opened up and I do believe the top can withstand the weight as advertised. HOWEVER, if you wiggle/move, you run the risk of breaking the hinges on the left and right side of the cart. When that happends, the cart cannot function. My husband, who weighs only 130 pounds, sat on the top one time only, and the shifting of his weight caused the side hinges to break, rending the cart pretty useless. There was no way to fix the broken plastic. So, yes, you can have someone much heavier sit on the plastic top without damaging the top, but the cart underneath may not survive! I did consider taller grocery carts but they were too big and cumbersome to store in the cargo area of my SUV when folded. The wheels on those metal grocery carts are large and stick up, and those carts will not fold flat. I found that the metal grocery carts have large "holes" on the sides and bottom where items can easily fall through unless you use a liner (which inhibits fully closing the cart). So, although sturdy, that type of cart didn't work for me. Just as a side note- prior to buying this second dbest cart for $76, I did purchase the dbest less expensive option that had the cart only (no top). I didn't need a second top because I had one from my first (now broken) cart. The cart with no top was nowhere near the quality of this more expensive cart. The cheaper cart handle wobbled badly and the aluminum was much thinner. I absolutely hated paying another $76+ for this cart, AGAIN, but it was the best option for me. My hubby will not sit on this one, and I pray it lasts longer than the last one!