No problems with the signal. I would have to say that their customer service is outstanding, and I feel kind of bad. We bought a new car last January and it came with 6 months of XM service. We decided that we really didn't need XM service, so towards the end of the 6 months, I called to cancel so they wouldn't bill my credit card. I took the easy way out and LIED. I didn't want to hear any sales pitch or other offers so I told them my wife lost her job and XM wasn't in our budget. Three months later my wife tells me that the XM service is still working. After confirming that it was still on, I called customer service to see what was going on. The customer service rep said that they went ahead and extended the service for the rest of the year at no charge. Feeling bad about getting the service free, I fessed up to my LIE, told them that I really didn't want XM and I would pay them for the 3 months they gave me, but to turn off the service. Do you know what I received from XM in the mail? It wasn't a bill. They sent me a refund check for the 3 remaining months of their service. I called their customer service and told them the complete story again, and that I owe them money, not the other way around. The customer service rep said it would be easier if I would just cash the check. I'm not going to cash it so I just ran it through the shredder.