We keep one at home and another in the car because we never know when we might need it. We haul stuff over city streets and sidewalks as well as indoors from lobby to apt. They do wear out--the handle mechanism can stick or the flanges/clips break--eventually. One previous model has reinforcing sliders along the top edge while the latest version purchased has the old-style edge stabilizer clips stored in the base--not nearly as convenient. But still the best and easiest to deploy. Happily the price hasn't changed much in decades.
I have had one of these cart’s for 12 years and it has been wonderful. It finally broke and I ordered another one but it did not come with the plastic strips that go on top of the sides. Without those plastic strips the sides bulge out very easily. I don’t know why they would not be built with those plastic strips to give it support unless it’s for the purpose of them breaking easily. If it would’ve had the plastic strips I would have given it a five star review.
I walked in and the young men behind the counter greeted me pleasantly. I asked where a cart would and one of them said "I will show you". I believe his name was Maurice...something like that. He brought it to the counter and an equaly pleasant young man helped with payment. This was in the Apopka FL store.