"Apparently lots of defects in early models, Nice sound and features"2.5 starson by drdobro
Pros: Does a lot, great sound, very convenient. Most options of any tabletop hi fi set
Cons: Sent one back for faulty XM reception. New unit has faulty broadcast band reception. Too expensive.
Summary: There are too many problems for the price of this unit. For the first defect I had, XM reception would go out suddenly despite a good location. Polk quickly replaced the unit and the new one seemed well until the broacast band began to have intermittent problems with loud chuffing noises. Isonic support says it's probably from brownouts in my house and to keep them posted (I'd have expected them to replace this unit too, given that the broadcast band is unusable with this behavior). I will try to see what happens for another week or two. However, I have a Bose, a Tivoli, a cheap Sony battery powered and a Cambridge 740 Soundworks and none of them suffered from the same problem during these episodes. Unfortunately, this one may have to go back too if the problem persists. There is also a problem with very poor responsiveness to the DVD-CD mode - slow to open tray, freezing. There is a new firmware update that is supposed to fix this. It will be a very good radio when all the bugs are ironed out, but I regret paying so much for it.Updated
The loud chuffing noises would not go away, so I needed to get a second replacement radio. It's been a very good radio now for months without problems. It seems optimized for fidelity with compression of Satellite radio, so one of the better options for listening to music on Satellite.