I use it alot on engines for people, works very well.
I find the best benefit is the poly moly on the skirts, it definitely makes them alot more slippery against the cylinder and it has excellant wear resistance. reduces the thrust side of the skirt from getting galled up, eliminates it 100%. I have also used the high build pc9 on a few old race sleds that new pistons were not available and they had old wisecos, worked awesome. Also have it in my old yamaha yz490 dirtbike.
The thermal barrier coating on the domes is ok but makes it hard to read the tops of the pistons.
never used the swain white exh. system coating. When getting stuff coated, always have used the ceramic coating(high gloss silver met.)