We had a them build a large concrete pad in our back for a gazebo foundation. The team was great - really efficient, came when they said they would, did what was asked properly (6" of gravel, wire meshing, slight drainage slope, final cuts for controlled expansion, brush finish). For the quality of work and number of people and time it took to get in done (they needed to wheelbarrow it from the front) I am very happy with the work. Note that at the time we received the quote, we had already dig the hole as we were originally going to do it ourselves...after seeing all the work it took, I'm glad we didn't!
For the perfectionists - the brush strokes are not 100% lined up and there are slight variations in the pad, but the slope is correct and for our purpose of a gazebo with a roof and outdoor carpet, these are non-issues.