I've got a Fire TV 4K from launch. Yes at first there were problems, but they've all been pretty much fixed now with the last update. The only problem I have is that the voice search doesn't always notice I'm talking even though I'm pressing the button. It's rare, but does happen.

Netflix does do 5.1 audio now, and the audio is louder than it used to be.

Side loading is easy when you know how. Kodi works fine, at least for the stuff I use it for. The use of a fast microSD comes in handy as well. The only problem though is that not all apps will work from the SD card, so you have to be a bit picky. That's because of the way the programmers have done things, not the Fire TV's fault. (The same would happen on a phone/tablet)

The only real thing missing is "All 4", but that's rumoured to be heading to the Fire TV, since it can be used with a Chromecast now.

I of course have iPlayer, ITV Hub, Channel 5, UKTV Play, TVCatchup, Netflix, etc installed. (STV as well, if you live outside of Scotland, you can just find a postcode for Scotland and enter that to make it work).

I use on the Fire TV 4K, installed from Amazon:

Total Commander File Manager, is what it says it is, it's easy to use with the remote, unlike ES File Explorer. It'll also allow copying/deleting/etc with the microSD card. Unlike other file explorers.

Moonlight Game Streaming for use with a PC that has modern Nvidia gfx cards for remote game play. (You can also sideload this if you want the newest version, but the one that Amazon offers up works well enough)

Allcast, to make it a little easier to cast photos etc.

Sideloaded stuff,

Firestarter to allow me to double click the home button, to go directly into Netflix, but it can be used to bring up a menu for launching your installed and sideloaded apps. It can be used to autolaunch apps as well from booting.

Kodi of course

Ftp Server by The Olive Tree Well for FTP stuff, this thing actually works with the remote and is free unlike the FTP servers that Amazon will show you. This comes in really handy, when you want to put your Emulator game files in the right place straight away instead of just to the Fire TV storage, then copying to the microSD card, you can do it directly!

Wukong Remote and Wukong input plugin. You guessed it, it's so you can use your phone/tablet as a remote / mouse / gamepad / etc.

And then of course you can stick on your favourite emulators.

For an Android phone/tablet to use with the Fire TV, (There might be iOS versions or apps like the following, but I've no clue since I don't own such a device)

The other half of Allcast

Apps2Fire to side load apps from your device to the Fire TV. It makes life a lot easier than messing about with a PC.

Wukong remote for what I explained above.

And of course Amazon's own Fire TV remote app.

I hope that helps someone? All of the above should work on the older version of the Fire TV as well, but some might not work so well on the "stick" because they just don't have the processing power needed.

I hope all that makes some sense? :sunglasses:

Beware - this new box has no optical out..

Not voting either way but heard it's very buggy and has problems.

You can install Kodi on it.

Oh I read few week back kodi had serious issues in that case heat

f**k Kodi you are saving £15 on the thing

isnt this the same as a Fire stick? in which case you can certainly install kodi onto it.. also better to use certain firestick launchers .. which make it better to use if side loading your own stuff.
because my fire stick wasn't working with all the stuff I wanted, I bought a proper android box in the end.. but heat for the deal!

Meh blu-ray quality you need a 4k TV for

Just bought the M8 , 2gb , quad core . Runs really quick and smooth

do these have netflix UHD app?