efi-x is a usb drive for 200 dollars
there is only the usual stuff on it that you would install doing a hackintosh on your own

rebel efi goes a step further with the drivers
but is essentially just a rip off that does not work
also it locks to your mainboard - so if you try it on one board and it does not work all the money is gone

empire efi is open source - it credits the people that deserve credit
and it probably works better than rebel efi too

i bought rebel efi
and it didnt work

i hope empire efi gets a boost
lets all support empire efi

empire efi is good
but still not easy and uncomplicated enough