I destroyed the casters on the Jegs one, which is like all the metal frame basic ones. Got down to 2 on one side and one on the other. Cheap stuff, but it lasted for a couple years. Mostly because the casters would get jammed and then slide sideways and get bent Prior to that I had an old finger and clothes biter with steel casters from the 70s. I just flat wore it out and had to retire it.
Later
When was the last time you *really* did something with your Z to call yourself a Z enthusiast?