I bought this hoping it would get the job done, and it did. We had 2 sidewalk pieces to break up, and they varied in depth between 6-10". It was too thick for just a sledgehammer, but this guy did the trick. We had a bid of $750 for the job, so with this and a $50 sledgehammer, we saved $500.
The only issue with it is the booklet does not explain what type of oil it needs. There was enough preloaded for us to do our one job, but if/when we use it again, we will need to figure out what type of oil to buy.