If you own a TCL Roku TV, the addition of the Tcl9+ sound bar is great upgrade. You can take advantage of Dolby Atmos ready apps like : Netflix, Prime and Disney. The soundbar when set up properly produces a wide soundstage with punchy bass that makes a cinematic experience. It's not going to replace the 5-7 speakers home theater systems ($1000+) but it can hold its own and certainly fill a medium sized room.
Protip: the movie setting has the most immersive sound. If you are not getting the deep bass sounds when you first set it up, most likely the sub isn't paired. The sub does a lot of the heavy lifting.