Have had this TV just over a week now, and can vouch that for the normal home user this is great TV with a fantastic plethora of features.
The internet video/streaming functions are superb. Relatively easy to navigate, straightforward and took less than a minute to auto-connect to my wired internet. Was able to stream latest Top Gear episodes in HD from BBC iPlayer on the BBC HD section. If you have a 'Love Film.com' account (or like me you got the free 3 months inc with the TV) then there's a whole library of films waiting for you on there, at just the touch of the button.
Aesthetically, the TV is gorgeous. It's not much thicker than 3cm, and trust me - if you're looking instead for one thats a few milimetres thinner, it really doesnt make any difference. At these minute thicknesses, anything around 3cm is super slim. The stand is easy to attatch, and is very discrete. The gun-metal effect bevel along the bottom front edge looks stunning too. If it's class you're after, then the EX523 certainly isn't lacking.
Sound is good. Can say I really use or could reccomend using the built in speakers. Lets be frank here, if youre spending this much on a television, you should really have a 5.1 Surround sound too. Having said this, the built-in speakers can certainly turn it up when you want to fill the room.
Plenty of ports. Theres more HDMI's than I can think of uses for. There's also a good selection of other ports too, but one thing to be mindful of is that the majority of the ports are all rear-facing, which menas any cables you plug in will stick straight out the back of the TV. This is a bit of poor oversight by Sony, as if you wish to flush mount this tv against a wall, you'll have a hell of a time trying to do it without snapping connectors or breaking ports. There is one HDMI socket that is side mounted, but unless you have an AV receiver with a host of HDMI ports, you won't be able to plug all your devices into the one socket.
Visually, the screen delivers well. Out of the box, pictures are vivid, crisp, and HD content looks well presented. For those techie's out there, I'm sure more can be had from this screen with the aid of a picture/colour calibration disc or something - you can adjust a huge range of picture variables and advanced settings.
If you do have very sharp eyes like me, you may notice some 'ghosting' around images. This really bugs me, but that's because I notice small details like that. Its seems most noticeable in dark scenes or pictures with many shades of black. To the average eye, this ghosting shouldn't be very noticeable - you have to look quite hard and not be concentrating on the programme/film you're watching.
The rear-facing HDMI sockets.
Typing web URLs or video search's on the remote is a bit tedious. Standard old mobile phone txt button alphabet layout.
I'm still warming up to this TV. I think after a few weeks, I'll be happy with all the settings/functions, and will hopefully know my way round the TV. Despite its few let-downs, this is still a great TV, and its hard to complain when you're looking at 1080 lines of near perfect high definition. For a 40" LED screen under £ (hello SONY!!!), I think this is a great buy, especially for those who don't want to jump on the 3D train just yet (-my opinion, wait another year for them to improve 3D TV before you do). There are a host of great reasons to go for this TV, and I don't think you'll be dissapointed.