Like it very much!
Thank you Amazon for quick delivery! Got in 24 hours.  I like this unit very much.  The only reason for 4 stars is I really wish there was a video explaining which buttons are for what and how to navigate.  Got it eventually, but I was so impatient to try it and all I could find was advertising and placement directions.  Excited to try it for different muscles.
Rating: 4 stars