I use this subwoofer as the companion to the Yamaha HS8 monitors, preferring keeping things brand matched (designed for).
Excellent build and quality with lots of features that tightly integrate with the Yamaha HS monitor range. It transforms the overall range of your sound. As cliche as it sounds, a new dimension is what it does. At first I had it placed in the usual floor position somewhere central to the monitors. It sounded great but maybe a bit too much sub for this placement in my room. However, once I raised it off the floor on a custom cabinet it sounded cleaner with more articulation etc etc, a game changer.
I always chuckle to myself when I read reviews stating these are not required unless you compose EDM or bass heavy music. I regard this as a complete misnomer. If you want to hear a bigger fuller range sound more articulated and relieving the workload of you monitor woofers then join the club. Instruments like synth, dropped down tuning with guitars/bass, or just for better music listening and or mixing then when we consider music being sound, why wouldn’t you need a more concise set up. I know the music I arrange is not remotely bass or beat heavy and the improved overall sound and feel is a stark contrast to using the monitors only.
On the negative side, the volume dial like the monitors is not notched with only a centre position.
In all, an extremely worthy addition to give your monitor field the kick it deserves, I would suggest even more so if you are currently running HS5 or HS7, as unlike the HS8 they have of course smaller cones with less bottom reproduction in any case. Staring the obvious there, sorry.
Highly recommended.