well i saw a guy tune his 98 ITR boosted B20/B18C hybrid and it was really cool, it is plug and play, his is the D-Jetro that uses the map sensor and lap top tuning, he had the commander that day, and it was really easy, i can see it being a problem when doing fuel maps from scratch, but is was cool
the one that
http://ap-engineering.co.jp/ sells i think is a SR one with the plugs re-pinned, not too sure...
the FC also comes with base maps and there are allot of support and other users to get advice with, i know the SR boys on Freshalloy love em...
butr as Dee said there are allot of benifolts from going stand alone systems like SDS, Haltech and Wolf etc, but if i could afford i'd go with the Electromotive Tec 3 or if they had it the AEM Plug & Play Programmable EMS, now thats the s***!!!