I like to use a traditional zafu cushion. After a few years, it lost some puffiness, so I refilled it with fresh buckwheat husks. I only tend to sit for 8-16 minutes, so it may take some getting used to if you sit longer.

It looks like that information may be come from a myth, according to the current Wikipedia page. CE Marking/ Misuse

Is there a better adjective you prefer to use to describe something that performs well?

Porque no los dos? Metalachi