I purchased this to listen to at work. When I first plugged it in, I was very happy. This review is on the product, not the service. I have no cmoplaints about XM service, but this reciever must have never been designed to be listened to for more than 45 minutes at a time. I had on that cut on and off all the time, and I thought it was defective. I received a new one, and the same thign. It is as if the receiver overheats and shuts itself off. After about 1/2 an hour of "rest" it will come back on, but beware, only for about an hour. This product is great if you will be in and out of your car, and you do not intend to use it for more than an hour a day. Otherwise, stay clear...nothing but a headache!