I purchased this for air brushing, and it works perfectly fine.
Along with my 3-meter air brush hose and with the compressor tucked in on the side of my grow tent, the noise is greatly reduced.
It's not that loud anyway. Except for when it starts up it makes noise, but then the air valve automatically closes and the hissing sound stops.
Their customer service is also fantastic and prompt in answering all my questiong.
PS, if you need to buy fittings, it uses the the NITTO Style Air 1/4"
Next I will buy their airbrush box and do some reviews.
In the mean time, look out for my youtube review of this item in the coming days