My dad called me last spring because his TV had "stopped working," which turned out to mean the HDMI-ARC handshake with his old soundbar had given up after a firmware update. I bought him a Streambar Pro the next week, mailed it, and have not heard from him about it since. That is the highest praise I can give a piece of consumer electronics.
The Pro does two things, and it does both better than it has any right to at $200. First, it replaces the TV's speakers with something that can actually carry a voice over a laugh track. Dialogue mode is the only sound setting most people will ever need, and it works: I A/B-tested an episode of a procedural with a lot of muttered detective banter and could follow it from the kitchen for the first time in years. The bar is small enough to sit under a 55-inch without looking comical and beefy enough to fill a normal living room with sound that doesn't make you wince.
Second, it puts a Roku inside the soundbar. That sounds like a bullet-point feature, and it is, but the practical effect is that you plug in one HDMI cable and you're done. No separate streamer, no extra remote, no fighting with input switching. The Roku OS is the same one that's been the least-annoying smart TV interface for a decade, and it has not gotten worse.
Bass is the obvious compromise. There is some, courtesy of the upward-firing drivers, but it is the kind of bass that suggests rather than commits. For most TV and most music this is fine. For action movies or anything with a real low-end, you'll want to add the Roku wireless subwoofer eventually, and Roku knows this. The pairing is two button presses and they sell a bundle.
The other catch is the Dolby situation. There's Dolby Audio but no Atmos decoding, which is the kind of spec-sheet omission that matters to about 4% of buyers and not at all to the other 96%. If you're in the 4%, you already know you're shopping for a Heston or a Sonos Arc. If you're not, you won't notice.
My one real annoyance is the Bluetooth handoff. Streaming music from a phone works, but the bar sometimes hangs onto the connection after I've left the room and the TV has gone to sleep, which means the next person in gets my podcast instead of the news. This is probably a firmware problem and probably fixable. It is also a daily one.
The rest of the experience is the absence of friction. The remote has a headphone jack for private listening, which I have used more than I expected. Voice search on the Roku is accurate. Setup took eight minutes including the wall mount, and most of that was finding a Phillips screwdriver.
Verdict: Buy this if you want one box that makes your TV sound and smart-act better, and you don't want to spend a weekend tuning it. If you already own a receiver or you care about Atmos, this isn't the bar for you.