I've got one, but it's not instaled yet. I'm still trying to figure this thing out myself. The problem is when you call Apexi, you always get an answering machine!
I was looking into getting one too, but the tech was out to lunch when i called. 1-714-685-5700 ext. 18 thats the extension for the tech keith, he'll know.
The new msd dis-2 it pc programable with built in retard. And you can get the map sensor thing so your retard will be boost dependant. Thats what i'm ordering.