I think you are confusing two different speaker systems. There is an FPS2000 system (digital 4.1), and a DTT2200 system (analog 5.1). There is no FPS2200 listed by Cambridge on their web site.
If you are referring to the DTT2200 system, I have had it for about 9 months (got them just after they were first released). Sound quality is fine for me. Some folks say you need more output power than they provide, but I find the DTT2200 system is more than adequate in a computer setting where you sit closer to the speakers than you would in an ordinary home theater setting.