Because it was the use with a load close to the allowable limit, there was considerable resistance, but it is still useful. Except when moving, I put it on a pillow so as not to put a burden on the caster. It seems better to use it up to about half of the allowable limit. There is no problem with quality.
I have exchanged and used it pleasantly because one was collapsed out of this time. I think that we will change the remaining three from now on. If it is urgently needed, I thought that it would be necessary for the delivery date. Actually, it took me about a week to come here, so I was worried whether I could trade.