I usually listen to audio through my expensive Yamaha receiver, but wanted something with a little less overkill. This unit is perfect. I also purchased the rear surround kit (sold separately) and am very impressed. (Note: I have this paired with a Samsung 55" MU8500 TV). The sound is clear and, when the TV and source settings are properly tweeked, the surround separation results in truly 5 separate channels; of course with the .1 sub. Something to note: while you can connect the TV via Bluetooth, you will not have Dolby Digital surround, but rather 5 speakers playing the same audio. I have mine connected to the TV via HDMI ARC and that's where Dolby Digital shines.
There is more than enough power to pump up the sound, and I have no problem with the bass output. Remember, the subwoofer only produces very low frequency sounds, so it is not something you hear, but something you feel. You can really put the sub almost anywhere in the room as the output is omni-directonal. This is a 3.1 soundbar, so it has a separate center channel that makes it easier to hear dialogue.
There are a few settings you can control with the remote: trebel, bass (the subwoofer has its own volume button on the remote), listening mode (movie, standard, music, sports, etc., but no surround mode), turning on/off the surround speaker audio, and adjusting the surround volume. Interestingly, since there is no surround listening mode, I have to set this option in my Samsung TV's audio settings. Odd. The remote also controls the overall volume, just like the TV remote.
There are some other "hidden" functions of the remote. You will have to download the complete manual (not included in the box) to enjoy all the features of the bar.
I don't know if DD is passed though the optical connection between the TV and bar. I don't have that connected. I have no other connections into or out of the bar.
This soundbar does not support any other decoding but Dolby Digital. Not ATMOS, DD+, or anything else. This is fine as the MU8500 only decodes DD and DD+ (if offered by the source). Honestly, unless you're an audiophile, it doesn't matter.
Why did I give this four stars? Unless you are using a standard sound output, read that: not surround, there is a slight audio-sync problem. What that means is the audio sightly does not match the video. This is sometimes called lip-flap. Yes there is an audio-sync adjustment on both the TV and bar, but rather than fix the problem, they exacerbate it. Samsung is aware of the problem but, as of this writing, there is no resolution. At least according to the Samsung forums.
Overall, this is an awesome soundbar and I highly recommend it.