I have purchased two of these and have not had a single problem from them. It is a beautiful monitor and rock solid in operation. Some of you might think it is expensive (and compared to others currently offered, it probably is), but if you already paid a lot of bucks for a mac you don't want a less than perfect monitor working along with it. You're going to be looking at it all day so you may as well get the coolest one you can find, and in my opinion, this is it. Expensive? Maybe. But in every other way, its about as perfect a product as you will find. ** One note - although it doesn't matter to me, the monitor uses a power brick which makes the power cable a little bulky. I just stuff it all behind the desk so no big deal but it could be to you.

I own two of these. First one for more than three years and another one is one year younger. Apple positions these as pro level monitor with superb tech specks and capable of great color accuracy. While the monitors are esthetically pleasing, the technical capacity is very low, color calibration is very difficult as two monitors exhibit very different color casts and brithness.
Even pro level calibration set could not eliminate it completely and it needs to be recalibrated very often.
The monitors are terribly SLOW with 14 ms times and not even in the league to compete in pro level status with today alternatives as fast as 2-4 ms.
The monitors are horribly overpriced, for the price of one you can buy TWO monitors of better quality and serviceability.
The monitors do not have VESA mount adapter (required for arm or wall mounting) and Apple wants to rob you of additional $30 for plain piece of metal. This mount is a standard feature of any, even cheapest, LCD monitors these days. And it makes the monitor even less attractive and more expensive.
If you were not fortunate to purchase monitor exchange warranty (highly recommended, Compusa, Staples other offer it) and if this thing in one year fails it will be cheaper to buy a new one than fix an old one.
Overall, my point is: it is a fine monitor for general computing and if you are willing to pay extra for its appearance it is fine. However if any color or movement sensitive considerations in the terms of pro-level work flow it is not one would put on my list.
For the money there are MUCH BETTER alternatives.

This display is not only nice to look at but provides excellent picture quality. It provides a sharp picture with bright, rich colors. And it's 20" size is ample for what I do. I found no defects in mine. Though it could be cheaper, it's worth the $600 I spent on it.

This monitor is a perfect fit for my new MacPro 2.66GHz Computer.
I cannot find any missing pixels...brightness and color are great.
Only blemish is a small spot on the lower front of the aluminum frame
where the anodizing failed to cover the spot.

Recently, my wife and I each upgraded our venerable Sony Trinitron CRT displays to widescreen Viewsonic LCD displays. The major reason we bought new displays was their large size and widescreen aspect ratio which provides plenty of desktop space and obviates the need for scrolling when working with wide applications, which are becoming fairly common these days. When we chose our ViewSonic displays we both really wanted this 20" Apple display which had the best picture of all the displays we viewed. We didn't buy this Apple display because, at that time, it was too high priced for our budget. But now Apple has reduced the price of this outstanding display, and it now clearly is the best choice in a 20" widescreen LCD display. Maybe my wife and I should consider selling our very good ViewSonic displays and replacing them with this topnotch Apple model which we bother admire so thoroughly. If you are looking for a widescreen LCD display please check out this gorgeous Apple display whether you use a PC or a Mac.