The performance is good but the motor did not withstand continuous operation (it was over 24 hours) and burned out. I had bought 2, the second one is still holding up.

Overall, I had no complaints, the sound seemed normal to me, it worked fine, okay the construction is nothing special, what others describe as "quality", but for the money it was expected. I used it daily for about 12 hours and in one month it broke, the mechanism at the back started making noise and it only worked on the third speed setting, after struggling to gain speed. At that point, I stopped using it.