Have been running the SC Bluefin for a few hundred miles now, so thought I'd share my thoughts.
I ordered my handset from JKM just as SC ran out of them so had to wait a little while for JKM to get their delivery. During this time there seemed to be a lot posts on this and other forums suggesting that people were experiencing problems so I started to worry a bit.
Anyway I did the upload at pretty much the same time as fitting the ITG foam panel filter. (By the way there have been opinions for and against this mod on the forum too - I've been in touch with ITG regarding the 'oil' on their filters in particular and their comments are now in my post on this [see 'Panel filter fitment - Edition30]. Very easy to do the upload (the remap is simpler than fitting the filter!).
Some people have mentioned the remap taking a while to 'settle down', with rough running for the first few days. I haven't experienced this at all... quite the opposite in fact; the car feels smoother to me right the way through the rev range in all gears. Even gear shifts (mine's a manual) feel more precise, bizarrely! Two passengers have also independently said that they think the car feels smoother. Overall it is just more 'driveable'.
The transformation is absolutely incredible! The car just feels more eager the whole time once you get above about 2,700rpm and if you keep it planted she just flies to the red line. Below that though and she's happy to trickle around town just as before.
Equally amazing though is the fuel economy. I've driven from Southampton to Bristol this afternoon and although I certainly didn't cane it (that's not my driving style) I did use the extra performance to good advantage on several occasions and when I got home the trip computer was telling me I'd averaged 37 (yes THIRTY SEVEN) mpg!!! I know the computer's not accurate (mine is optimistic by about 5%). On previous identical trips, though, I've returned about 31 at best.
If anyone's thinking about the Bluefin remap for an Ed30 I can't recommend it highly enough.
Shaun