I moved apartments in February and my Arc didn't fit under the smaller TV in the new place. I borrowed a Beam Gen 2 from a friend who was about to upgrade, hooked it up, and after a week I bought my own and gave him his back. It is not the bar that wins on a spec sheet against $1,000 Atmos rigs. It is the bar that wins on the only metric that matters in a small room, which is making the small room sound bigger than it is.
Dialogue is the headline. Sonos has been tuning the Beam line for human voices for three generations now, and the Gen 2 is the one where it became automatic. I have not touched the Speech Enhancement toggle in months because the default is correct. A late-night dialogue-heavy show in a room with a sleeping toddler upstairs is exactly the use case this bar was designed for, and I have tested that hypothesis more than I'd like.
Ignore the Atmos badge on the box. The Beam Gen 2 has no upward-firing drivers; Sonos does the height-channel work in software, which means it doesn't really do it at all. You will not hear a helicopter pass overhead, and you should not pay for this bar expecting to. Buy it for what it actually is: a very good front soundstage in a small cabinet that happens to accept an Atmos signal without choking.
The Sonos ecosystem is the thing that makes this an easy recommendation even five years in. AirPlay 2, the Sonos app (which had a rough year and has mostly recovered), seamless grouping with any other Sonos speaker in the house, Trueplay room correction if you're on an iPhone. None of this is glamorous. All of it is the difference between a bar you use and a bar that becomes scenery.
The physical things to know: it is small enough to fit under any TV down to a 50-inch, the cloth wrap is a fingerprint magnet, and the lack of an HDMI passthrough means if you have a separate streamer you'll connect it to the TV rather than the bar. Connecting a Sonos Sub Mini wireless takes thirty seconds and is the upgrade that turns this bar from "good for the size" into "competitive with bars twice the price."
My one frustration is that Sonos charges separately for almost everything. You want a sub? Pay. You want rear surrounds? Pay twice. By the time you've built a real 5.1 setup with Beams as the rears, you have spent Arc money and you have a more cluttered shelf.
Verdict: Buy this if your TV lives in a normal-sized living room and you want it to sound right without thinking about it.