I've got a sony Pro-logic system i've had for about 3 years now. The sound quality is good, but I only use it as a glorified amp, as the laser on the CD player (3-cd changer) clogs up so quickly with dust. There's other CD-devices in this room which are fine, so i'm guessing the design of the unit just attracts dust. The tolerance on it was never very good anyway, as it would balk with some CDs anyway.
Plus, power cut and its set the clock time.
Incidentally, i unplugged my DVD player (a Panasonic) with a dvd in it at a specific point, and left it for about an hour whilst I moved my TV and stuff around. When I plugged it back in, I was most surprised that it remembered the point! I expected unplugging it to clear the memory, but it didn't!
So impressed I was!