I was in the market for a new monitor after my 17" Sony decided that life was no longer worth living. I decided to look for a larger screen, but I didn't want to pay an inordinate amount. This monitor fit the bill perfectly.
The diagonal is truly 20", but takes some getting used to as the screen is much longer horizontally than vertically. It has a very fast response (I hooked it up through the DVI cable), the color is excellent, and I haven't found a single dead pixel. I haven't yet tried the controls, as the picture was fine out of the box. Some folks complained that the bright blue power indicator light was distracting, but I don't notice it. The lack of high-end features, such as built-in speakers, wasn't a problem for me.
In short, if you're looking for a great basic LED monitor at a price that won't break the bank, you've found it.