I got 'em. They're awesome. Don't know if they're better than the E'brocks, but you sure get alot more input from Kaufmann. They'll help you put the build together, not just sell you a set of heads.
Also, consider contacting SD Performance. I sent my Kaufmann's there for CnC porting and chamber cleanup.
I'm a hobbyist. Not a professional. Don't be hatin'!