Pros: Attractive, many features, very adaptable
Cons: Can't think of any.
I have not noticed an appreciable difference between the the Delphi (XM) and Ericson (Sirius)receivers as far as sound quality is concerned. This receiver is no longer being manufactured. Sirius made a hardware change in late '06. There are still plenty of these receivers listed on EBay. etc.
My choice of Sirius over XM was based on programming.
The Starmate Replay will let you record 44 minutes of program material. This is the maximum memory of all of the higher priced Sirius receivers. If you program it, it will alert you when your favourite artist OR favourite song is currently playing. You simply hit the "Dog"(unofficially named "Mongo") button and you are transferred to the station. This receiver is the mid priced one in the Sirius line up. I don't know why anyone would spend any more money, when this receiver has everything you need. It is the size (if not slightly smaller) than a conventional car stereo face plate. I can't say enough about this unit and the service. I am a long haul truck driver and I can attest to the coverage all over Canada and the northern States. From what I have heard, the same can't be said for XM, especially in northern Canada.
As far as service is concerned, the big draw with Sirius is Howard Stern. XM's big deal is Oprah. The choice is yours. I should mention that Sirius has Martha Stewart and Cosmo for the ladies too.
I chose Sirius not because of the hardware, because both Sirius and XM hardware are superior. I chose it because of programming. Sirius appealed to my whole family. They have a family comedy channel (and two channels of uncensored stuff too), a Disney channel, Discovery channel, CNN, Playboy and enough music to get you confused. You will spend hours sorting through all that you get for $15 (Canadian dollars) P/month. You WILL find a favourite channel. Trust me.
With this unit can (with the requisite hardware) detach the face plate and bring it inside the house to your home stereo. You can also buy a "Boom Box" that the face plate attaches to (very handy for camping). In addition, you can also register (at no additional cost) and receive most of the programming over the internet. Anywhere you go in the world, you can hear Sirius! Check out the Sirius website for more details on the hardware. You will be surprised how affordable it is. The music channels have NO COMMERCIALS! DJ'S that speak to you once in a while, but NO COMMERCIALS! The talk radio stations have commercials but nowhere near as many as terrestrial radio.
You will not regret this purchase.