Are these cubes good?

Found these on Amazon here's the link I wanna know if they're good https://www.amazon.com/dp/B0CJB3LP7V/ref=sspa_mw_detail_1?ie=UTF8&psc=1&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9kZXRhaWwp13NParams