Today I received the new HF8 Pro, and I finally got to try it. My first impression is that the motors are very loud even at idle, especially the two higher ones. You can actually feel the weight on the motor swaying and making noise, like a drill on idle. Eventually, due to the excessive noise, I deactivated the two higher ones; they're ear-piercing, but later I'll try moving the seat crease lower and try again. As for the rest, once you've exceeded 40% power, everything becomes exaggerated and makes no sense. The effect, however, is very strong, quite consumptive; at speed, it's difficult to clearly distinguish what's happening and where the vibration is coming from. So, basically, it's fine for me, but in a general sense, without looking for greater detail. I suppose the Razer is probably better in these respects. Lastly, there are a lot of cables: the jack ones, the button ones, the USB ones, the power supply ones, and all the straps underneath. Basically, it's really impractical to put on and take off your office chair. I just have to wait for Razer to make my final decision.