Since the end of December I have acquired the Sonos Arc, Sub Gen 3 and 2 one SLs.
Very happy with the sound quality overall! Sounds just a bit boomier (bass on -3 and sound sub a bit lower) than my previous separate Jamo speakers, Klipsch 100sw sub and Yamaha receiver.
But what an incredibly good soundstage and just solid sound. A great added value for TV, Series and Movies. I am already a fan.
Only problem: This runs to my Sony XE9005 TV which only supports HDMI-ARC. The Sony native apps Netflix, Disney+ and youtube work well (including Atmos over DD+) - no to little audio delay - maximum 10-30ms, almost imperceptible.
The connected Apple TV 4k (HDMI to Sony), on the other hand... This causes huge lip sync issues (Infuse, Netflix, Disney+) with a typical audio delay of 100-250ms. After hours and hours of troubleshooting and tweaking all possible settings, cables, etc, I've solved it for now by adjusting the audio delay via the alternative media player app MrMC. Depending on the codecs used within the media files, I sometimes have to adjust it a bit, but for most files it's around 240ms. Other Apple TV media apps that do not have an adjustable audio delay are unfortunately no longer useful.
My hope is that this problem will be completely eliminated when I buy an eARC TV in the next few years. Previously, when my Apple TV was still connected to the Yamaha receiver, I had no lip sync issues at all.
If anyone can recommend a good eARC TV that works well with this Sonos setup, I'd love to hear about it. Slight preference for Sony due to superior motion in film and series.