Evercoat polyester primer??

[jercars]

Doing my Charger very soon and I've heard good things out of the slick sand and super build primers by Evercoat but I have no experience with them. They're both very thick primers that should greatly speed up the blocking process. Just like anything else they sound like the best way to go but I want to do some home work first. Has anyone out there every used the stuff? Did it work well? Did it hold up down the road?