So this is my first experience with a replica tune. And honestly I don't have my original Fit nor have I driven one since my first few days. This tune is definitely a keeper in my garage. After taking it to several career races at a variety of tracks and trying it on CS, SH, and SM tires I found it a very comfortable and predictable FF. Yes it understeers, mostly when I was off the throttle mid corner, but the turn in and corner exit were very tight. I was especially impressed when I put the throttle down at just how much tighter the rotation was and how much giddy up the car had exiting corners. My favorite race was by far at Trial Mountain on SM tires. This car handled that course with ease and felt awesome. Really great job!