By far, lightning is the biggest killer of controllers. It really doesn't matter which of the big 3 manufacturers you use, lightning hits = dead controller. Controllers all cost to replace, regardless of the brand.
Of the thousands (and that is many thousands) of Intelliflo pumps installed, the number of motor failures can be counted with your fingers since it's initial release over four years ago. It's sealed, permanent magnet motor is water tight. It typically runs at slower rpms since it has a 3HP impeller. The others use a 2HP impeller. The motor is rated to 10HP but is governed to 3HP. I think the Jandy uses the same motor but it's controller limits it to 2HP. The Hayward uses a standard 3 phase induction motor to keep its costs lower but they charge nearly the same as the others, which is typical of Hayward, more cheaply made but charge the same price.
Pentair still holds the overall lead in my opinion in reliability, engineering, innovation, and support. Next up is Jandy and then Hayward. About the only thing Hayward has gotten right was the Super Pump.
Scott
