Are beauty devices effective?

I am taking this opportunity to do some research and am considering purchasing a beauty device to take care of my skin at home.

I am curious if beauty devices actually work as advertised. In particular, I would like to know if the Medicube AgeR Booster Pro Mini helps improve skin hydration or elasticity, and if it causes any irritation.

How is the performance for the price? Since it's in the 100,000 won range, I want to know if it's actually good compared to other beauty devices. Please share reviews if you've used it.