Bought 2 for simracing(under chair), but then I tried it with some music, and I use them for that since almost every day.
I like bass, had a big sub, but now I dont have the space and privacy, so I use headphones with shakers, and they really are can provide the same or even better feeling that a good subwoofer can do, but more shaking with almost no audible volume, combined with a good low extension headphone, its the best thing to have. I work from home with my partner sitting next to me, and I can hear and feel my music perfectly witout disturbing her.
Now, its all nice and good, but it has its flaws and limitations, got a faulty one with a broken spider (they have a plastic spring that holds the shaking weight) and got that replaced, had no faults since, but i heard others are getting their spiders snap too, so must be careful with them.
They are also not the strongest performers, having a huge resonance spike around 33hz, and not having any low end extension, because it starts rattling.
I have switched firmware on my 3D printer calibrator (accelerometer) and made some custom apps and code, so I can measure the frequency response on my chair, and generated some PEQ curves with REW based on those measurements, and managed to get the response mostly flat, and its like night and day! Not just the same frequency overpowering, but nice resolution, better low extension, but.. still has no power, so I'm getting the new bigger brother, the 300 to replace the 2 small one, and planning to measure and calibrate the hell out of that too, and will put these under my footrest/pedal plate.
So overall, if you can smooth the response, its good enough, just a little weak. Without EQ its meh, but okay for simhub if you dial in the effects optimized for its curve.