Summary: First TV we have purchased in some time. Amazon was great. They matched the best price (of their listed competitors), delivered it for free, and at the time were charging no tax. The set is nice, but it froze and basically stop working in a very short time. Amazon took care of us without a hitch, swapping the defective unit with a new one very quickly. That's why we try to use Amazon, and they really came through.
Summary: I am using it for both 2D and 3D. Pro: 1. Excellent and sharp 2D HD picture quality in true HD channels and in Blue-Ray DVDs. Great depth of field even in 2D. 2. No slow or dragging in high motion/speed scene; 3. Color are true and balanced. Brightness is sufficient. 4. Menu and programming are easy and user-friendly. Remote control is easy to use 5. 3D effect and quality is generally satisfactory (depending on the 3D quality of the movies). Con: 1.
Summary: The only reason for not giving it a five star is the not so smart feature of the web browser not supporting mouse. The browser is the one of the best i have seen on a tv but it's not so useful without the ability to use a mouse. Bought a logitech k400 keyboard with trackpad. The keyboard works fine but not the mouse. Talked to Panasonic customer service and they did acknowledge the problem.
Summary: Update: 08/2012 I'm really satisfied with the ST50. The picture is great, even on standard definition using default settings. There's no buzz or display anomalies. I tried a custom setup using a tweaked CNET spec, and it did make the picture brighter and perhaps a bit sharper, but the heat output is a little higher as well.