We used ACE to lift a few slabs of cement (driveway and front walk/porch) in front of our house. They had settled over time. Through the process there were a couple sections out of the 5 that were stuck and would not move. It was part of the front porch that was edged against the foundation. They worked on this problem for hours and tried every trick in the book but they would not budge. They apologized and didn't charge one dime for all the hours they put in working on those two sections. You don't really know what kind of a company you have hired until there is a problem and then you see how they handle it. These guys will be my very first call for any foundation or cement issues. Two thumbs up. Adam owns the company and he's a man of his word.