Works well
The is a great portable spa.  It makes quite the turbulent waters when on high.  It's very relaxing and theraputic.  The only issue I have is that my deep tub has a textured bottom so the suction cups won't stick.  They do stick at the front and back of the mat, but not the middle (due to my textured tub).  However I am sitting on the middle so it works out.
Rating: 5 stars