I got my m20s from Pangolin last week. Took about 5 days to clear customs.  I am currently mining on low power mode. Doing about 49TH/s at 1950 W. Fans speed is at 2100 RPM so it is pretty quiet. Lower noise than an S9. If i crank it up to 69 TH/s then it makes a fan hum that I can hear in the house from the garage. I am pretty happy with it so far.