Plantar fasciitis, happens because your tendons are shrunk, not stretched out properly. Most tennis shoes will keep your foot elevated at heel area, these keep you heel level to actually a tad lower, so those tendons stay stretched.
I started wearing K-Swiss years ago, but stopped and started with all the new stuff and now I'm back to them and my heels don't hurt anymore. My pronated arch is even better. I do stretch my tendons every morning when I get out of bed and then put these shoes on.