I bought the stihl because i was tired of sprayers only lasting a few months before breaking. Knowing stihl products, their build quality is outstanding. The sprayer is well made but badly designed. The pressure release only drops the tank to probably 1bar, bursting the contents onto you when opening, a huge issue if you're a bonehead who uses chemicals. The sprayer wand is in the way when pumping or opening and shakes around when shaking to mix the contents. The hose isnt long enough. There is no pre-screen for solids in the tube, so compost teas block it very easily, requiring you to dismantle and clean. The extension is so thin that I won't consider using it. the strap lets the sprayer swing too wildly, knocking into things. Stihl should consider prototyping things like this with every day users first.