This is a great machine for the price. It works well with no issues. The included instructions are poor so you should look up YouTube for setting up a jackhammer, especially with regard to topping up the oil, 15W-40 appears to be widely recommended. Similarly, there are spare brushes, but no information on how to replace them! In addition, I could not find any way to get replacement/additional chisels. I really wanted a longer chisel, but no information is available in even ordering replacements down the line. The only other issue is that I have is that the machine comes without a case, just the shipping box.