MSD timing computers, these sound great! Please read

[lendaddy]

MSD offers what they call a programmable timing computer that seems is a beautiful. With this I could take my old distributor and put in new bushings and shims, remove all the advance and retard BS and use it simply to spin the rotor. Am I missing something here? It just seems too good to be true. I have the advance and retard curves for my car at home now so programming should be a breeze right? Now to me this is cool!