I have used them as well as Namura, Wiseco, Vertex, Pro-X, Pro Circuit, Athena, Art, Robin, Wossner, J&E, Ross, TRW, Arias, Diamond, Gibtec, Race Tec, Venolia, Mahle, Ross and BRC.
Some I have not used is Sealed Power, Keith Black, Federal Mogul, Probe, Cosworth, SRP and Omega.
Some for automotive engines and others for motorcycles and ATV's. All in all, they all do the same thing - plug a hole. The hype about which is best all comes down to max performance characteristics at extreme RPM and HEAT.
The higher the performance demand the higher the cost, but just putting in a Hi Pref piston will not make the engine faster, the piston simply compliments the engine design to extract the performance demanded of it.
Piston manufacturers sell hype to the public to profit from their design derived from extracting horse power from race engines. The piston is just one ingredient of the recipe. Of course, each manufacturer wants the public to believe just using their piston will make their engine more powerful, faster and perhaps longer lasting. Carillo was created when disgruntled J&E employees decided to compete against their former employer. However, the Dover Group owns SRP, Wiseco, J&E, Carillo rods and Crenlo (manufacturer of parts for John Deere tractor cabs and electrical enclosures).
Pros - they work
Cons - the higher the performance they are designed for, the higher the cost
Shop Owner and Mechanic with over 50 years experience