How many people are running the bluefin map on here? I'm really tempted to get in on the group buy if I can get some feedback from people to say they have had no problems with it and have been impressed with it!
£348 is a very good price.
Try doing a search for Bluefin or Remap.
Superchips offer a 7 day no obligation money back guarantee should you not be happy with the additional gains.