I'll tell you my quick first impressions after having it this past week.
In terms of sound quality, it's excellent. I had heard it side by side with the Samsung soundbar that I originally bought and the difference was negligible. I have since learned that since those 2 systems were connected by way of optical, and that I would have to run the Samsung out of my TV. I'm sure the audio I WOULD have been hearing would be much worse than provided by the full HDMI connectivity (see my previous posts). The Bluetooth connectivity is great, no problems there. The active sub is down-firing, and is powerful enough that my neighbor downstairs has knocked on my door once the day I was testing it, and once at night b/c of the bass. You can adjust the sub with 4 level settings, the same for the dialog level. You can also turn the 3D surround and clear voice effects off completely, which I haven't done yet.
There are 6 sounds modes, and the dialog and sub level remain persistent among all the sounds modes (contrary to what tech support told me.) I'll add my findings as they come.
My only minor gripe is that the main unit has LEDs, but there isn't any display that you can read from a distance. For the input selection it's not a big deal since the picture and sound essentially indicate the source. But the sound modes aren't displayed in text, just a bright green LED (after you turn off the auto dimmer). You can tell it's switched, just not to which mode, unless you've memorized the order, which isn't unreasonable with only 6 available. You will probably use your ears anyway. The modes are:
Standard - Comedy and Dramas
Stadium - Live Sporting Events
Music - Musical Instruments (Concerts)
Cinema - Movies
"News" - I can't remember if this is the name, but this is the intent as it emphasizes dialog.
Stereo - Any source can be heard as 2 channel
Also, you can identify the audio source (Dolby, PCM etc.) but not bitstream, although you can change the default Main mode to Secondary if there is dual audio, so I guess you can indirectly confirm bitstream this way. I would refer you to the product page at Panasonic to read latter pages of the manual, b/c I'm sure I've confused my audios source codes here.
It will definitely be loud enough for your room by the way. I may even find some way to isolate the sub from the floor to annoy my neighbor less!