I received this a couple of days ago and have already put 3 or 4 hours on it. The cabinet is well constructed. It arrived in a wooden box and was packed perfectly inside. About an hour to assemble; a hoist is a great asset as this is heavy. The flow control on the bottom is great. It allows fine tuning for the media: I have used ceramic and garnet so far with excellent results. I have a 5 horse, two stage, 4 piston, 60 gallon, Quincy Compressor rated for continuous duty. This unit needs this type of compressor. In fact, an 80 gallon tank would be better. I was going to purchase the larger cabinet but the reviews indicated it does not have the media/air flow control on the bottom of the hopper. My opinion: this flow control is mandatory for good operation. There are no leaks. The vacuum works great. I am totally satisfied at this point.