With the micrometric tolerances on todays high end engines, I just don't trust a process which I doubt has the exactness and quality control needed for such engines, plus your piston is allready worn out and the coating gone, they only reduce the skirts diameter but nothing is done to the piston (correct me if i'm wrong).
Sure it will work, but I just don't think it will be the same as a new p/s. Would have to try it to believe it. When you get yours back let me know how ypur engine performs. Prove me wrong.
AFM