Spray crete does not guarantee cracks coming back even with the optional mesh to go onver and the optional layer underneath. To me just seems a quick fix if you was to sell a house or something.
i think you would be pretty daft to put it on cracked concrete to be honest anyway. i was just saying it looks ok if you have sound concrete, i have a plain concrete drive thats 40 years old with no cracks which would be perfect, but im still going to take it up n pave it with cobbles problely