Anyone ever buy Zol tubes?

[54ny77]

Came across them online on Amazon, seems like ordinary no name tubes with a branded logo box kind of like a QBike. Curious if anyone's had/used em. Great pricing, hence the inquiry.

I have nice ultralight and/or pricier latex tubes as well as QBike (from a bike shop, which I'd assume are just no name bulk tubes, maybe from QBP?) and regular Conti/Michelin in various wheels, and for the life of me can't tell the difference in ride quality. I do have good tires on all wheels though.