real performance and fuel mapping is another thing entirely. Its like buying a bodykit for your car. You can buy original urethane parts or get someone to make a cheap knockoff out of fibreglass. Both look the same but the quality is vastly different. Nissan ECU works and is adequate, but if you want the best then you need to pay for it. Motec is one of the best, thats why I thought some would be interested to see what the difference is. Wether or not you think its worth the money is a personal choice but hopefully these screenies give people a better idea.