That would be me. I've done about 1800k's with it installed. The car performs really well. The feel with gentle throttle is the same without the JB1. With moderate to heavy throttle, the engine pulls harder for longer in each gear. I don't have any special map on mine but I believe you can have one that makes the car behave more aggressively.
As for fitting, I had mine done at Hills Eurohaus in Castle Hill. I don't think it would be difficult for someone to fit with some amount of technical ability!
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