i just didnt get on with the gizzmo, it seemed cheap and not up to much really. the blitz ones are quality units and great bits of kit. ive fitted 3 or 4 blitz ones and theyve all been spot on, ive got the id3 one with the nice screen in mine. my mate has a blitz on his vf28 gt when it went on the dyno the boost gets straight to 1.1 bar and the line is horizontal till the redline it holds perfectly. the hks and greddy ones seem go0d also but ive not used them my self.