BB with HEI style distributor

I've already seen a few posts on the board with people who recommend using the hei upgrade over the original coil,ballast,module. I know slantsixdan highly supports it.

My main question has anyone used a self contained unit on a bb mopar, like this one? http://www.ebay.com/itm/DODGE-PLYMO...Parts_Accessories&vxp=mtr&hash=item56481d94f9
I know Ill need a coil for it but it looks like that's about it.

If so how easy was it to install and according to the description I can just get rid of all the old ignition stuff anyone know if this is true?