The customer service is excellent.
I was very excited to receive my mat as I have a good friend who says it has totally taken away her pain. When I received it, it wasn't working properly and I contacted customer service. They were very prompt and helped me to return it. They were willing to replace it with one that worked however, I learned that because I have too much metal in my body from surgeries that it would not be good for me to use this mat. I was able to get a full refund in a timely fashion. I believe this is a reputable company and that their products are good and effective.