The most important thing about purchasing this tool is to recognize who you are. Are you a professional who uses it every day? I do not understand it. It will not survive this type of use. This tool is for a homeowner in a very special situation - someone who has a job or two on offer, who has an expensive supply of labor and can save a lot of money by doing so. In my case, I'm breaking up concrete, clay, and rock to install a drain pump for which I was offered $1,800 and can install it for $700 including the purchase of this jackhammer. Knowing I need to install a drainage channel for the driveway I will be using it again. Saving is worth my time. And forget the rent: have you checked the rental rates? Home Despot or Blowe's will charge you a hundred dollars a day for a Hilti or Bosch SDS Max tool and you'll forget to buy it because it's a thousand dollars. This is for people who do it every day. If you spend a day and a half with this thing, even including warranty purchase and 40w oil, you're paying yourself. And while there are big differences in quality and lifespan between the Hilti and Bosch models and this one, they don't matter if You only use them once or twice a year. Mine arrived with no oil and I left at 40th mass. Recommendations are everywhere, but it's about in the middle. Replacement brushes are nice to look at, but you still won't get thousands of hours of use out of them: knowing what's going on. itself, and a limited amount of planned use, this thing is golden. It will do the job, as will all of its various clones, sold under different names and possibly different engines, but all from the same Chinese factory and with similar capabilities. Get a guarantee and work with it, it will save you thousands of dollars.