So I have had the M7's along with a sound bar, 4.1 configuration. Since 2016., I haven't had any specific issues with the units other than they keep losing the wireless connection intermittently. I would like Samsung to not lose sight of what they started off with when they sold these to customers. Its a lot of money that we all have collectively spent in buying these products and hope that these will get software support and functionality to integrate with WISA and other similar systems where possible given that Mark Levinson and Harman are members of the initiative. I don's see much in the way of development of functionality or software updates pertaining to the Multiroom product. Hopefully, someone is listening!

I have 3 M7 speakers and have found them to be excellent. Good base, very loud, connect well across the house. I like that I can connect to them using 4G on my iphone once they have linked to my wifi. The app was rubbish to begin with but has been updated within the last year and is much better. If you have a big house, use powerline adaptors to connect them rather than hubs to extend the wifi, its much better. My only complaint is that it is now impossible to get hold of the wall brackets. I'd live to mound one high up in the corner of my kitchen but can't find a mount anywhere on the interenet.

If you want multi room go sonos Samsung is terrible keeps loosing connection terrible app too