Bails098

I am looking at going with a stand alone system on my 383 LT1 edelbrock heads, cam intake and throttle body as well as headers and nitrous up to 150 shot. i have lookin at this kit http://www.spectreperformance.com/emspro/ wondering if anyone has used it, looking fopr some pro's and cons as well as tuning using this kit.
If someone could help me out it would be greatly appreciated.