Hard working little machine!
Broke after only 3 uses, but I contacted the company and they replaced it.  The second one is working, but it's really harsh and is not a comfortable massage for use in the car.  If you want a gentle massage, this is not the one to buy, but if you like a vigorous knead, this will do the job.  Only gave it a 3 due to the first one breaking, but the company is on the up and up.
Rating: 3 stars