I've just bought one (see my thread further down) and so far so good.
It's not 'thin' - a good 3 inches thick and the whole stand feels a bit plasticy but the main thing on any screen are the pixels and i find them to be fine - sharp pictures, no bleeding as far as i'm aware of, and fast response time.
I wouldn't ever use a tv as a monitor; the brightness will give you headaches and the top and bottom of the screen will be cut off probably due to overscan.
I would happily recomend the samsung to anyone. 24" is such an improvement over 20" or even 22"!