I bought one of these about 4 months ago and I have been racing it around the shop ever since. The only reason I bought it was because of a coupon I had (came out of Sport Rider Magazine) that saved me about $15 on the purchase. I think it brought the cost down to $19.95.
As you can see in the photo the swivel on the casters are loose and they are not the Rollerblade wheels one would expect. I feel the sheet metal is a little flimsy and could be made of some heavier gauge stuff, because I do feel flex in it every now and again.
I have spent $20 in worse ways, so I’m not gonna complain. If I use this enough it might justify buying a better unit down the road when this one takes a dump.