17th Aug 10 What a difference! I have chipped many of my cars in the past, and after the ease of buying the Navarra tuning box of you I had no hesitation about getting another one for my new Range Rover Sport. I had a plan this time to drive the car for a few weeks before I modified it just to check all was Ok with it and how big a difference it made, unlike the Navarra which was chipped with 8 miles on the clock! I was averaging 23mpg for 6 weeks and then fitted the “box” With just a single plug to find it was a 5 minute job to fit and you instructions were great with the pictures of the actual plug. I have now after 2 weeks got used to the extra power but could never drive it without the chip. My driving is smoother and you need less of a lead boot to get it going. The massive upside of this is the MPG difference. I have just got back from Holiday in France and was towing a trailer. I averaged 31 MPG due to the fact the roads a clear. Since my return this has dropped to a more sensible 27Mpg. I have just placed an order with you for my brother who has 2.7 V6 Discovery and he is looking forward to its arrival. Thanks for your quick delivery and great service. You have a product to be proud of. Ian