Hiya Daz, it went really well, I don't know the exact BHP figures as I don't really go in for the rolling road stuff but I bought the chip second hand, bit of a bastard to get the ECU out from the drivers footwell and opened in the dark lolol.

But it made a hell of a difference, just felt nicer, smoother and more powerful. Would highly recommend one, having said that I've never tried the Bluefin so I don't know what juxtaposition is to the Collins!