My wife and I both had 10 year old samsung CRTs. Hers finally died so we picked this LCD up from costco for the $199 deal. I liked it enough that I went back the next day and got myself one to replace my CRT. However, there still are a few issues. (and all my tests were done at the native resolution of 1920x1080)
1) Although it doesn't bug me since I like the brightness up, mine does exhibit the humming sound others have reported at lower brightness settings. However, it varies by input. For HDMI, the noise has a peak at around a brightness of 50, and then fades out the futher away you get (and it completely gone at +/- 10 or 15). On DVI, there are 2 peaks at 80 and 20. Analog also has 2 peaks, but they are at 80 and 30. My wife's monitor also has the same humming at about the same peak on the analog (don't know about HDMI or DVI)
2) I had a problem with blurry text. Filling the screen with text, it was very obvious there were columns where the text is blurry, then a column where it was sharp, and then it would repeat every 3 to 4 inches. Oddly enough, the problem is only on the HDMI. I don't get the same problem with an analog or DVI connection. My wife's monitor doesn't have a problem with analog either (again, don't know about HDMI or DVI).
3) With the HDMI connection, the screen does not fit on the display. Setting "Image Size" to 16x9, it chops about 30-40 pixels off each side. Even after setting it to "Just Scan" mode, there are 3-4 pixels cut off from each side of the screen. This problem doesn't appear on DVI or Analog inputs. They are pixel perfect.
4) The buttons...they are cool and annoying at the same time. In case anyone doesn't know what the deal with the button is (I don't think anyone has spelled it out)...they aren't actually physical, mechanical buttons. They are just words printed on the lower right corner of the frame. You touch where the words are and it behaves like a touch screen (of the iphone/ipod touch variety, where you just touch the glass, not like those cheaper touchscreens that have a plastic film). Ideally, this should not have any problems with the button wearing out (a problem I've encountered with a number of monitors over the years), so that's a plus. And the design/appearance is kind of cool. That said, it's inconvenient because when the room is dark, it's difficult to see where the buttons area (and there's no tactile indication). Even when you can see, it's not always intuitive. The "SOURCE" button is only responsive on the left half of the text. Same with "MENU".
So that's what I've noticed about it over 2 days. Mostly, it boils down to the fact that HDMI sucks on this monitor. Aside from that, it's pretty darn good. I think the initial color settings were a bit contrasty/saturated, but it looked pretty darn good after a few adjustments. Then I calibrated it with my Spyder 3 and it's great now.
Also, I'm a photographer, and I've heard lots of dire warnings of "don't use a TN panel for image editing". However, in what I've done with it in this short time, I've seen no issues. No banding or flickering. The only issue is the color/contrast shift at an angle. If you are sitting in a chair looking dead on, it doesn't really make a difference if you lean a bit to the left/right. The bigger issue is if you slouch or sit up straight. It's more sensitive to vertical changes in orientation. That said, it's pretty minimal, and I haven't had much of a problem with it in my brief experience so far.