Looking at a cheapy heat/massage back cushion... any insight?

[jdc]

Somethng like this...

For occasional use. Thinking something with "shiatsu" style roller balls will be too much. Just smile heat and vibration...

There are 50 different models... some for $50 and some $250... wondering if anyone uses one and sees the diff.

https://www.amazon.com/Snailax-Massage-S...a?dchild=1&keywords=chair+massager&qid=1613111981&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFWNlRIUU03NTdXVjYmZW5jcnlwdGVkSWQ9QTAxNDc5ODVRMEJUSzNLVVUxQzImZW5jcnlwdGVkQWRJZD1BMDMwNzA2MDE0QkVSVThJSVJZQVQmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl