I like the way the M5 sounds and I that it recedes into the background

Flow is the best way to describe the best part and value of this speaker

Don't even bother playing video games with this as there's just no way to sync it

That aside, best way I can describe the sound quality would be to compare the M5 to some of the other speakers I routinely listen to

He'd stated that the best way to ensure a strong and consistent connection is to hook it up to your home network, but even having mine hardwired via Ethernet cable to the network, the BeoPlay app STILL doesn't see my M5 - even though I've ensured that my iPhone is connected directly to the thing via Bluetooth, and the Ethernet cable has it hardwired into my WiFi network

The app also gives you a way to upload updated firmware into the speaker (happily, this worked flawlessly for me) and to get the version and the serial number of your device