I'm not exactly sure why the negative reviews on Amazon, but installing was easy, and now my picture looks amazing and is showing lots of improvements.
*It will not remember anything prior other than network information because it needs that to update and install. So that means prior calibrations, and streaming services will need to be done again. That's because it's almost like getting a new TV, which is essentially the point of an evolution kit so you can bring your old 2014-13 TV into the future. Because we all hate when we spend money on an expensive TV only to know that next year they came out with something that's better than your TV in every way. Like those who were early adapters to 4K only to be told that the 2014 TVs have all the required hook ups need to stream 4K or even watch 4K. So the evolution kit came, and solved that issue. So for those of us that are willing to spend the money for Samsung's best TVs, won't be left in the dust when Samsung comes out with a new version.
So from the start I noticed the color accuracy has improved, as well as detail. It didn't blow my socks off, but I knew instantly there was a difference. I'm sure when I watch 4K HDR I will have a different tone.
What did blow my socks off was the 3D, and it dramatically improved it, because 2D to 3D just wasn't showing depth, and just wasn't flying off the screen like I would like. After the update, it looks really good.
This is really worth the buy, especially since Samsung announced that this will be the last evolution kit they produce for the time being. That's because they've reached a point where they can't really upgrade anything else, with this update you have the newest HDMI, the new Tizen browser, new remote, 8 processors, upgraded picture and 3D and the biggest and the real reason you should get this is HDR support. 4K UHD Blu Rays will be in HDR, which means much brighter brights and darker black levels, expanded color, or as Samsung put it, it's better.
If you really want to get the best out of your Samsung 2013-14 4K TV, then this update is a must have!