I just received my SEK yesterday and installed it. I had to remove the TV from the wall, so it was a two person job. Thanks to the comments here, I installed it firmly into the back to make sure that I didn't put it back on the wall only to have to take it down again to push on the SEK. I haven't played with it too much, though I notice the apps now are all laid out differently - you have a app panel, and then you can press More to see your whole app collection. I guess they got rid of the folders and I haven't found a way to rearrange my apps in the app panel.
I never used my IR blaster before, so I put it together for the first time and it works well. My STB is not that close to the TV so I am not sure how I would have handled a wired blaster.
I like the program guide that they have that I can use in lieu of the STB's program guide - but I do wish that it remembered what channel I was on. If I tuned to TBS for example, and then later brought up the guide again, it starts from channel 1 all over again.
The other thing I think I see an improvement in is that it seems to be a lot quicker in handling the files I have on a hard drive that is connected via USB.
One last comment - when I search for movies or look at the recommended movies, shows - and click on Watch - I wish it would also scour my Netflix, Hulu, etc. library to show me those options too that may not cost me any money. It seems to only show me Cinema Now and Vudu.
Overall, I am happy but I haven't done too much with it yet. I received the 1006 firmware immediately after setting it up.
I'm grateful to you all for commenting on it so vigorously so I was an educated consumer before buying it.