LG SH7B 4.1 Soundbar w/ Wireless Sub

I have this soundbar hooked up to a LG 65UH6150 and I have also hooked it up to my LG 65UH7700. So far, I love it. The sound is much better than I expected. One of my concerns was having the sub be over or under-powering, but it was happily almost perfect at any volume and with any medium (movies or music). The sub automatically synced up with the soundbar from 16 feet away with no problems. The soundbar did require an optical connection for the 65UH6150 and would not connect to it wirelessly. However, the bar is able to be completely operated from the 65UH6150's remote. It turns on/off and does the volume seamlessly. I have a paid Spotify account and I can easily cast the audio from my phone to the soundbar and the sound quality was very good. I downloaded the LG music flow app and have been using it as well. I have since purchased two LG H3 wireless speakers to use as a wireless rear channel. I'll add more once I see how they perform. Many professional reviewers noted that the system really pops with two H3 wireless speakers as a true rear surround channel. I'll be interested to see if the soundbar actually dispatches rear sounds to the rear speakers (true 4.1) or if it's just a copy of the front stereo channel (parallel 2.1). If they work well, I may buy additional H3s for other rooms of the house.