To get to the point, let me tell you what I think is great about the product and what isn't great.
Great: Soundbar quality/powerful sub, low profile/modern design of the soundbar, easy setup, 3.1 system, ability to add remote speakers for surround experience, and the ability to toggle the middle speaker within the soundbar.
Not great: Lack of bluetooth connectivity (though not a huge deal), no automatic off after a period of non-use, below average remote control legibility.
You know how on shows like "House Hunters", people have a laundry list of "must haves" (4,000 sq/ft, pool, open floorplan, great neighborhood, new construction, wine cellar) and then only have a budget of $200,000?
I find that most people that have reviewed this product and give it a 1 Star of the similar mentality -- unrealistic expectations.
I will preface this post by letting you know that I looked at a lot of soundbars (online and in-store) before I purchased this product. In fact, I had originally purchased a similar Sony 3.1 system (HTZ9F) that is brand new for 2018 with all of these fancy technologies to mimic Atmos sound (for nearly the same price). I was so disappointed that I returned it the same day. Additionally, I previously owned a 2.1 Sony soundbar that had good sound (and was only ~$250) that was purchased in 2013. The reason for the new soundbar was (in part) because I wanted something with a slimmer profile and mostly because I wanted to improve on the sound quality.
Simply put, if your first priority is a soundbar that has very good sound quality, then you should strongly consider this device; however, if your first priority is not sound quality, but instead other features, then you should probably look elsewhere.
My priority is sound quality: If I wanted mediocre sound, I would not buy a soundbar and stick with the factory speakers of my new 65" Sony TV. To me, I wanted to have as close to a professional audio system (i.e. receiver, amp, sub, speakers, etc.) without: 1) having to dedicate that much space; 2) having to spend that much money (easily north of $1,200); and 3) having to spend a lot of time on the installation or hire someone else to install it.
Will a soundbar have perfect sound? Certainly not within my $800 > price-point.
A lot of the resoundingly negative reviews have come from people who have mostly commented that there is not an HDMI cable, there is no bluetooth connection, and/or that the remote sucks. Those are fair criticisms, but if those issues are such a high priority, then why would someone purchase this soundbar in the first place or not return it within a few days of the purchase (Best Buy has a 15-day return policy, after all)?
I think that it would be wise to evaluate your priorities ("must haves") within your price-point and then decide on the best unit for you.
Other options to consider:
1. Sonos PLAYBAR: Sounds great, but the sub is an additional $700.00 totaling ~$1,300.
2. Klipsch RSB-11: Very good sound, but it was too bulky for my needs.