The EZ is not the greatest choice. You are locked out of the ECU and can do no personal tuning, as other similarly priced systems allow you to do.

EFI is great and I am a BIG supporter of it, but DON'T buy a system you can't tune. As stated, other systems that cost essentially the same as the EZ can be tuned with a laptop OR let the box does it's thing only, but at least you have the choice