Great customer service and product is great. I was slightly disappointed that I wasn't made aware that when you state the level of petrol your car currently holds, VUDU without asking, create your map based on this fuel. I currently have 99ron in my vehicle but might, in an emergency, have to use a lesser-grade petrol. I asked VUDU if I could have a lesser-graded fuel map but they said it was an additional charge of £80. A shame I wasn't given the option of what grade fuel map I wanted. Yes, they give you a form to fill in but it asks 'Fuel currently in car (Octane & Brand):' To me, this is asking about your current fuel in the car and not asking what fuel leveled map you'd prefer. Misleading.