Holley sniper efi

I have a 360 I am putting together that I was originally going to put a Holley 750 double pumper on, but someone I know is selling a Holley sniper kit for $550. I am wondering if it is worth it to make the switch? I found a website with data showing the 750 cfm carb outperforming the sniper system, but was wondering if anybody has this system installed and can give me a rundown