Holley HP EFI, TC, and Isis

Two questions. First I searched around a little but didn't find much on here. Wondering if many of you have used the Holley HP or Dominator in your builds and how you like it. Did you buy the harness as well or have to modify? How was the learning/tuneability in this application? Recommended?

As related to that there has been some recent discussion here about traction control. The Holley hp has an add-on TC module from Davis Technologies and I'm wondering if anybody has experience with that. There are two models but potentially seem better suited for drag? Thoughts? More Traction

Second question (or like 6th depending how you look at it), do you guys recommend using ISIS or consider it worth the money/time saving? Seems like the basic package isn't bad but then you have to tack on different modules. Whats has everyone been doing/adding to get "full" functionality and then what was final cost related to using ISIS?
 
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