Coming to cut down 4 trees by pros, I have everything to be debited. Large branches and trunk I have a very known brand and powerful machine but heavy and held with both hands. For small branches that are excellent for maintaining the lights so I invested in this little machine. It's been a 20-odd hours I use without pb and with ease. JOperation fuel ready two times (A little expensive ...) but that does not leave deposits in the carburetor. So easy start even after days without use. The only advice I can give but not assigned to this machine is that for handling these chainsaws, they are dangerous for inexperienced people in this exercise.