The Blitz controler is a bit more expensive than the Apexi but tbh its probably just name tax your paying the extra for....

http://shop.edoperformance.co.uk/bli...k-p-10715.html

Here's a pic of the controler Im using in the GTO along with a pic of the Power meter Ive got hooked up to it. The two together make a unit thats around din size, making installation quite easy in most cars.