This is so amazing. I fell asleep using it the first time.
It has an auto shut off after about 20 minutes so it's not a big concern if you nod off.
I was a bit sore the day after my first use but that was to be expected. I was manipulating tight muscles.
Each time I used it I felt better and better.
This is an amazing product. Well made. I actually purchased a second one for my son.
I can't imagine not owning one now.