OK, I'm just gonna paste my first impressions from
r/Syng
TL;DR: Setup was easy. Had to reposition one of the units to get placement and experience working. So far sound good and work well with Apple TV for music, but bass is a bit overpowering when coming straight off an OG HomePod setup.
Unboxing and assembly was pretty simple and took about a half hour for three units.
App + setup experience was great!
Take the statement that "you can place them anywhere" with a pinch of salt. During setup the units emit sound pulses and use that both for room correction AND to establish where the units are relative to each other. First time around they got it wrong, and so of course the sound experience wasn't at all great. Once I repositioned them in a more triangular fashion (two front, one in rear right corner) around my listening couch, things were as expected.
When switching to new equipment, it's very hard to trust your first impressions. Doubly so when the experience is so different.
The spatial audio DEFINITELY works. The listening experience most definitely puts you in the middle of the music, rather than having your brain try to place it based on two distinct sources. The experience is much like wearing a pair of headphones with a wide soundstage (like, say, Sennheiser HD 650)...
...a pair of VERY WARM headphones, sound-wise.
Sticking with the headphone analogies, to me it sounds like the soundstage of HD 650s with the sound signature of Fostex TH-900. Not unpleasant, but definitely not neutral.
My initial guess at what's going on is roughly what I experienced with my Devialet Phantoms and the aforementioned TH-900 headphones: There are lots of material out there that is actually mastered in a very bass-heavy manner, but it doesn't show on lots of setups, either due to lack of ability to render it - the usual case - or due to the tuning being either neutral or bright. When you put a recording like that on a warm system with lots of bass power, it feels overpowering, at least at first.
A few examples of that so far: Massive Attack/Mezzanine (no surprise), Fiona Apple/Criminal (also no surprise, really)
However, a few pieces that sounded normal (tonality-wise) to me: Roxy Music/More than This, The Stones/Sympathy for the Devil, Pink Floyd/Comfortably Numb.
I am working today, so there won't be much chance to get deeper into this until perhaps in the evening.