I bought this TV from Amazon a few weeks ago and I have no complaints, the service was from Amazon was excellent. The TV has a lot of features and with it a lot of settings. The default settings out of the box are not ideal and initially I was rather disappointed with the picture and motion blur, I even saw this in a shop on a display model where they had failed to change the default settings. Once these are changed the picture is much more fluid, no ghosting and in HD truely remarkable.
The TV is one of the first to benefit from LED backlight technology and it is clear that the colour and contrast levels are significantly better than a standard LCD TV. Even though it is an LED TV it is not as slim as the new Samsung LED TV's and it's quite heavy at 43kg. Although for me the Samsung LED TV's are not as sharp as they should be and this is very apparent when viewed next to a normal Sony LCD, which is why I ended up buying Sony. This TV upscales terrestrial TV and DVD sources to HD and it achieves a good result.
With LCD technology moving so fast it's clear that this TV is already outdated and I expect that the next Sony LED LCD TV will have the Bravia 3 engine and be significantly slimmer and lighter, and with an even better picture. Still the 46X4500 is an excellent TV and it's price is dropping, making it even more attractive. If it is in your budget it's worth reviewing.