I have the Sonic handheld, $110 on Amazon. Works like a champ. I've never used a Theragun or Hypervolt so I can't compare, but mine gets the job done. I can't imagine spending more than $100 - even that was a reach for me.

For about five years prior I was using a Black and Decker floor buffer; those are like $30. Much, much louder but also very effective.

hi I used to use the hypervolt, I got this one and i like it more because it has 5 settings opposed to 3 on the hypervolt. it comes with the case and all the attachments too. sonic massage gun