I SET UP THE SATELLITE RADIO last night, and it was very easy: Charged the battery, called a toll-free number, and was up and running in about 15 minutes. The sound is good (I plugged in my excellent Sennheiser iPod headphones instead of the cheapie earbuds that come with it) and the user interface is quite easy to navigate.
However, on the advice of reader Christopher Fox I ordered the antenna / headphone combination yesterday; I’ll report on those when they arrive. He says that performance is a lot better with those, and the price was low.