speaking from experience...
their HU's are nifty, but sound quality wize, they suck hard...
their coaxils need more power then most to play at the same volume level (meaning that you can maybe get a set of RF's at 30%volume to play as loud as a set of sony's at 45%volume)
their amps overheat and shut-off on you at the worse possible time...
and MOST of their subs are not worth it... as i've said before, when the shit says 1300watts peak power and 400watts RMS, something is seriously wrong...SOME of their subs are OKAY entry subs (maybe if your 16 and you want boom in your car. you would have to have atleast two though)
and thats my take on sony's xplod line of car audio equipment...
-qs