go the powerfc, sorry wins hands down in most cases unless you can afford wolf 3d, autronic, motec
it just seems with the other piggyback style systems you need to find a competent tuner
then you are back to the old remap style issue where only 1 or 2 workshops can do / fix it / tune it
so your stuck with lack of competition, options and alternate/cheaper pricing
if i was to do another car , powerfc no questions