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The sound produced by this is excellent and it really does Dolby Atmos especially well. If you can pick it up at a value price it's even better (and it was significantly cheaper than anywhere else I could find either online or in stores). For stereo input via HDMI or analogue the multi-stereo mode is really good for filling a room with sound.
It's really easy to setup. The only thing not to forget is to change your 4k or standard bluray player to not decode the sound and pass the raw stream out to the reciever.
The only drawbacks I can see are - ARC doesn't always work unless you've also got a Sony TV (it didn't work with an LG) and if you want to delve into the menus they are somewhat confusing until you get used to navigating them (they would be better if they were onscreen as well if you have a TV connected - it would be a lot easier).