For me personally, I would only buy Jetway and ASRock if I was on a strict budget. They are ok boards for the cost, but I would prefer different brands myself, just based on personal experience.
Essentially, they resist sudden changes in current flow, smoothing the power that goes through it.
All boards will have the power going through a power regulation system, usually including chokes.
Generally speaking, the more chokes it has (in paralell), the more power can be delivered to the CPU.
That's a hasty generalisation.
Just because a brand might have made many low quality products, doesn't mean all of their products are low quality.
I'd call the HA06/HA07 boards high quality. Diamonds in the rough for Jetway.