Summary: At the offset I have to say I did NOT purchase my Sony tv from Amazon and it's the KDL-55EX723 model I have, but I thought some prospective buyers would like to know that what you buy at purchase date is not what you necessarily have 12 months on. I did not know that Sony frequently update the TV's software without prior approval and I'm sure in most cases it can be an improvement.
Summary: I bought this Tv and was really pleased with it. Now, 15 months later, it is out of guarantee and it won't switch on: the standby light flashed 4 times at intervals - which the Sony help desk informs me means it needs a new part that will cost £500 to install. I am not throwing good money after bad, and I will never buy Sony again. I feel they have robbed me of £645. I wish I had just bought a cheaper make of television.
Summary: I brought this Sony TV for my PS3 but when I started playing MW3/Blackops/Battlefield3 the TV has lag which was why I kept dying, so I returned the TV and went back to my old Sony CRT. But the picture quality was great but I seen Samsung TV's have better.