This breaker just arrived a couple of days ago. I bought it to put a trench in my basement concrete floor for a sump pump discharge line. I sawed two parallel lines about 6” apart with a diamond blade on my Skilsaw, then used to the breaker to break out the concrete between the two lines. Worked great using the provided chisels. I can’t speak to how well it will last, but so far so good. Instructions were reasonably good, the breaker was easy to set up, short learning curve. It was a bit expensive for the job I had, but cheaper than hiring somebody. I'm 79 years old, so it can’t be too hard to use. :-)