I own and work with this saw on a daily basis cutting mostly brick pavers and block. Overall the saw is what they say it is. But it's under powered and there quick cut blades are crap. They say you have to dress the blades, but you shouldn't have to do that every 2 days. The 20 amp saw pops breakers if you try to cut at any decent pace. I'm going to convert it to a 30 amp and run it off a generator. The dustless design does catch most of the dust when the saw is brand new with new filter but ends up in about the 70% range or you keep buying filters for it. All in all it is costly to maintain but, it's still the best design out there for me right now. I think a much better design would be gas power to the saw and electric and or gas to the vacuum. And a circle Arbor hole so we can use the blades we know and trust from the companies that have put a lot of money into R and D. The Q drive was pretty shity thing to do.