Have used a Northern Tool model for 20 yrs now.
Works great, and I have run it 8 hrs straight.
Some problems...I screen everything, even new bags of silica. Nothing more frustrating than a plug-up. Finding the sweet spot between air and media. Yeah, sometimes you have to clear a jam by diverting all air into tank to force media though mixer manifold. I hook up 2 or 3 compressors to get max output. Nozzles will clog, with any unit. Just be able to clear fast as possible or hose fills up with sand.
Deadman is OSHA ona jobsite, what you do at home may vary.
And wear a respirator, no one is Superman!