Well, this isn't a full report on the Sony 333ES but it may be a little late as it is, since I heard Good Guys no longer has them. The bottom line is that I'm very impressed with this machine and highly recomend it as a redbook player with the bonus that if you want to play SACDs it can do that too.
This is used primarily with a system with speakers (NHT 3.3), and it is by far the cheapest component in the system, even if you used the Sony's original list price of $1200. Originally I was using the older Rega Jupiter/IO and then later upgraded to the Linn Ikemi. Substituting the Sony for the Linn has been a real surprise, as I could (and plan to) easly live with this substitution, unlike some other players I've tried. The bass is excellent, it's got very good soundstaging and dynamics and it's only a little less refined sounding than the Linn, which costs around $3400.
The headphone jack on the 333 sounds pretty decent and has lots of gain and it's own analog volume control, so it's pretty useful. It doesn't quite have the refinement and bass depth as a good dedicated unit, which would likely cost more than I paid for the 333.
This is my first CD changer. I'm not a fan of changers. They are big, slow and make lots of clunking noises, and you have the added problem of keeping track of what's where. I'm sure it will come in handy once in a while but usually I know exactly what I want to hear, and it's easier and faster to just pop it in and hit play in a single disk player.
In summary this is a very good player, probably worth what Sony originally asked for it. At anything near the $400 I paid for it it's a no-brainer.