Oh, I love this, so glad I went for this one which has Heat and Vibration in one. So unfair that I have developed some back pain after doing PLANKS in Yoga class. what was I THINKING!!! But this addition to my car seat is Very Helpful. The buttons are easy to figure out. The Heat can be intense. There are So many choice of vibrations to choose. to be truthful: this seat pad is quite addictive; I look forward to car rides just so I can have a massage… ..More