Very very quiet, it's not smoking fast...but plenty fast for me. Fit and finish are extremely good, comes packaged very well and the Turbocharger now comes with a cover hehe.
My local dive shop just got a professional grade 4500 psi capable compressor so it's probably going to be next year for me. Tough decision because it's a 45 minute round trip to get a fill and the new rifle takes a 4000 psi charge. Thinking hard about selling some gold which I don't like to do but....
I have only had my turbocharger for a couple of months. My only regret is that I didn't get it sooner. What an excellent machine for making 4500psi air. I have probably shot more in the last two months that all of last year because of my unlimited high pressure air. I know heat is the great destroyer of high pressure compressors, the cooling system has been working flawlessly, it never gets hot!
There is something about that unit that keeps drawing me back to it. Cost is not extreme, quiet, very nice features, seemingly reliable, and fast enough. Hope all that have them continue to note results.