I think mine is actually a Sirius/XM radio. I’ve been very happy with it.
I signed up with XM just before the merger. Back then the XM recievers were not compatible with Sirius hardware. Docking stations, boom-boxes, and so on didn't cross connect. I don't know if that has changed.
With the small receiver, I can take it with me when we travel; the thing is smaller than a flip phone.